Learned Mr. Mahapatra has given valuable advice. Kindly follow it.
Your are right that your notice period shall end on 02nd March. On this day you can submit final resignation giving reference of notice of resignation and stop attending office. Since you are complying to the terms of appointment, you are not at fault.
You may submit notice of resignation addressed to the good offices of your appointing authority, MD, Head-HR, by letter dated (date of your email i.e.02nd Feb) also and obtain acknowledgment. You can obtain acknowledgment form the desk/reception where all mail of company is received. You may submit final resignation by letter followed by email also. You may submit a reminder also stating you have tendered notice of resignation in line with clause number.......of your appointment letter and your effective date of resignation is dated 02nd March,2012 as already communicated in person to your reporting authority/HR namely Mr/Ms………..on dated .........and reminded on dated.........and dated..........You may cover all representations in person/by email etc, and conclude that you shall be resigning on dated.....and shall be available till close of office hours of dated..........You may ask to whom you should handover the charge and company property under receipt and company may supply you acknowledgment and acceptance of your notice of resignation/resignation, work experience/service certificate, relieving letter, settlement of a/c and payment of dues, FNF statement, PF number/accumulation reports/withdrawal-transfer forms, NOC/NDC, form 16 on your last day in office i.e. dated.........In the same letter you may give synopsis of your contributions to the company, performance, achievements, deliveries, incentives-appreciations earned by you, and good conduct , and may mention that you had conveyed to your superiors about your intention to resign on dated.........( before the date of your notice) and your superiors had asked you to postpone the notice and you had concurred and have been concurring to the advice and now are not in a position looking into your DOJ of next venture, and seek intervention of good offices for smooth exit formalities to be completed by close of office hours of dated........02nd March. You may mention you are willing to cooperate with your line management and company post resignation/separation also and shall help your best.
You may meet the officials of good offices and explain the situation ( after submitting letter and email) and it shall help you. Post meeting you may submit the minutes of discussion in polite and gentle manner.
The date of relieving is not given by employer although in some ventures like IT etc the situation at the end of employer may demand the presence of experienced employee in seat. The date of resignation is max. as per employment contract. Employer has to ensure that replacement employee is designated on receipt of notice of resignation and those tasks are assigned to employee which can be completed within effective date of resignation.
However such situations demand exceptional levels of persuasion, persistence, reasoning, negotiating skills and application of rapport and goodwill. You can do it. This happens with almost all employees, all companies and a smart employee shall resolve the matter, build record in his favor while in employment. Be Smart.
The settlement of a/c should happen on last day in offices or within two days. However majority of the companies take time say 30 days.
In case you face any difficulty you are within your rights to approach good offices again and then o/o Labor Commissioner/wages Inspector or your lawyer and courts of law.