HDFC Bank — closing salary/saving account

Address: Lucknow, Uttar Pradesh, 226021

Dear sir,
I have a salary account in hdfc bank, this account is opened by company end where i was working (C. P. Milk food pvt. Ltd. Lucknow). Hdfc bank open my account with zero balance, i left the job now i m not using my account since 1.5 years approx. Hdfc bank converted my account type without prior information. Now apply penalty for minimum balance. I was going so many time to near my hdfc bank (Sahara state road, jankipuram) for closing my account but no one response me. Then i was going main branch of hdfc (Near harajaratganj) to talk about my account but bank manger said to me you have linked your adar card & pan card with your account then we closed your account, when i have submitted the document according to manager then he say to me, you paid the penalty then we proceed your request.
Now hdfc is applied penalty every month for minimum balance and inform to me.
Sir, i m lower middle class person how to pay this money. (Penalty money approx 10600 rupee)
Please help me to close my account.

Thanks & regards
Pradeep kumar upadhyay