HDFC Bank — About credit card bill payment

Address:	Hyderabad
Website:	HDFC bank

I had one credit card issued by HDFC bank.in the month of March 2020 I lost my cell phone and hence I have to change my mobile number . Since OTP is the only method to pay bill, I was unable to pay .I called customer care number the inform that since covid lockdown I am unable to update my number and they confirmed that there will be no impact but as soon as bank branch’s open, please update and pay bill,

In the month of October 2020, my saving account got blocked and I couldn’t withdraw any amount hence I called again customer care and asked for the solution, they told me to pay minimum due of around 3500 and my saving will be unblocked, I asked for the help from one of my friends and paid, again I called and asked but this time they said that information provided earlier was incorrect, you will have to pay full amount and about 80000 was deducted from my saving account,

Later in the month of November 2020, I went to branch based in Nallagandla Hyderabad and asked to block my credit card since full amount has been paid.
Branch manager told me that if you will not use for some days, it will automatically get block,

Again in the month of March 2021 I again started receiving calls with regards to clear bill amount since that time I am regeresslly trying to talk with customer care, multiple visit on branch and tried my best efforts to resolve this but no associated person had helped me to resolve.

I have made around 50 visit to branch and more than 100 calls to customer care and have been tried all the ways suggested by customer care asssociate

Please help