HDFC Bank — negative balance after I requested to close my account

Address:

Kanyakumari, Tamil Nadu, 629275

I had a salary account before 8 months as i quit the job so i would like to block that account and also i did with the formal procedures for blocking my account. I handovered my passbook, cards everything to them and filled the block request form as well but even now also i am getting notification from the bank so i used my g-pay account to see the balance by restoring it and i was shocked because it showing -2, 190.00 rupees as a negative balance and i tried to contact customer care it is not connecting. Please help me out of this i don't want this any more to happen again.

Thank you