Learned Mr. Godbole, Mr. Sethi has given valuable advice. Kindly follow it.
You should be mentally prepared to pay the last bill, to the date you lost sim card/advised the company to cancel the mobile number/connection, if it was left unpaid till date, by you. However you should negotiate hard and obtain in writing from company that since they did not deliver the last bill, they enclose the certified copy and the final amount to be paid by you is the last bill amount only and after the payment of this amount company shall have no claim pending against you and shall withdraw your name from list of defaulters from all credit bureau, CIBIL, etc and shall clean your credit history in manner that in future you shall have no bearing on your credit rating and eligibility to avail loan etc.
Under no circumstances you may give your pan number to them. BSNL collects Pan Number and self attested copy in case customer wants ISD connection as additional service. Private telecom operators activate ISD as a default service and claim that activation is free, and are now demanding pan card copy citing some imaginary rules.
RBI has set clear guidelines (available on their web site) for recovery agencies. It is suggested that such agencies be run by advocates so that operation is conducted in a lawful manner. Companies disburse handsome incentives on collections/recoveries, hence the illegal activities of coercion, threats. You are within your rights to post your complaint to them, and demand penultimate action on Idea and recovery agency. You can complain against this lawyer to Bar Council also. Some concluding action needs to be taken by some vigilant and aware customers or their lawyers to contain the menace being perpetuated by them and nuisance being littered by them. Since majority of the citizens/customers either being unaware or because of “why should I” approach, at the most, file a consumer complaint and the companies escape with a mild financial penalty, and thereafter continue with the same illegal and bad conduct.
As per the SEF signed by you company at the most file a complaint under 7-B, at the jurisdiction civil court, duly expressed in SEF, which in your case shall be Mumbai. Demand a certified copy of SEF in writing if the need arises, although in all probabilities company shall not supply it. The court can issue summons, so as to enable you to submit your side. The summons if not delivered are routed thru “ Pyada” of the court who shall come to your address, and in case still the summons are not delivered may ask the o/o commissioner to help delivery of summons, and local SHO may ask you to receive summons only. The police shall not arrest or conduct any enquiry. Nothing moves without money. Hence companies cause telephonic coercion, and arm twisting now e.g. spoiling the credit rating like banks.
In case you chase company can not decline to reveal the collection/recovery agency.
Also first the company shall send communications by SMS, letters, arrange field visit by their collection staff/agency, who have to carry their ID cards, with prior appointment only and they are duty bound to collect facts and resolve the matter, and supply the bill. It appears you never received any request for appointment or visits. Company shall supply legal notice. It appears that company has not fulfilled its lawful obligation. Hence company is deficient.
Have you obtained second connection by supplying same ID and address proof, and did you mention your previous mobile phone number in SEF for 2nd connection. Did the company conduct verification at your address? If yes company could have added previous bill in bill for 2nd connection.
Kindly be careful in future and maintain proper record of each representation carefully in your file. You never know at a later stage you may need it.
Next time if some one threatens you record the call and ask him to utter the date, his full name and address, stating that you shall try to send some of your relative/friend to him/her to settle the matter. You can reproduce this conversation at appropriate time to appropriate authority.