In the peculiar situation the affected citizen should record the incidences (audio/visual).
The tantrums of the bank's official are to dispose the matter verbally and somehow subdue the complainant from lodging a protest by giving an impression that nothing shall happen.
You should use RTI route to know which are the authorized personnel, to generate credit report (at your location) and on the strength of which documents (do not budge an inch on this) your credit report was generated and circulated.
You must apply your resources and obtain copy of the credit report generated by PNB, as based on unique number ban can not deny.
You can escalate the matter to Chairman of the bank and narrate the incidence date wise and by mentioning the names of the bank officials and their respective statements. You may point out that in stated of being apologetic in writing the bank staff Mr/Ms...........are adamant and recalcitrant and you feel that they are habitual offenders and shall continue with their illegal/unfair/unprofessional activities, and they have no respect for the rights of the citizens and fear of bank's disciplinary rules and law of the land. You may demand the action taken against them in wring and that you shall be constrained to approach the institutions of print an electronic media, police, courts of law, public and legal forums, NGO's, government regulators, ministries, RBI.BCSBI at the cost and consequences of the bank. You may mention that you shall collect the cost of legal opinion and all expenses from the bank. You may enclose a list of the expenses incurred so for including traveling to the various officials, phone calls, parking i.e. each and everything. You may stress upon the fact that your credit report can not be generated and passed on except in specified situations, as per RBI guidelines. The guidelines are available at the RBI website. Bank has lowered your image, credibility, and has trespassed your rights, before generating the report, at the time of generation and distribution of your credit report, and treatment given to you after your complaint. Let it be their funeral and let them handle it.