[Resolved]  ICICI Bank — Unnecessarily charging

I have been issues a credit card by icici bank.
I did some transaction and paid the amount for it

Dear Customer, Total Amount of INR 15973.4 and Minimum Amount of INR 2600 is due by 28-APR-20 on your Credit Card XX3002. Please ignore if already paid.

I paid 15973.4 rs and then didnot do any transaction.

Then these messages started coming-

Dear Customer, Total Amount of INR 2624.26 and Minimum Amount of INR 140 is due by 29-JUN-20 on your Credit Card XX3002. Please ignore if already paid.

I ignore coz i already paid

Then few days back i got a call from one of the their employee saying i haven't paid my dues.

How come when j haven't used the card and done all the payment why is it pending.

Is it my fault that you communication isnt clear.

I haven't been receiving any statement.
I have tried downloading mobile app multiple times.ask customer care multiple times about the same, yet no solution
I get message from company-
Dispatched: Credit Card Statement for Acct XX3002 is sent by local post on 15-SEP-20. You will receive it within 12 working days

But god knows which address does it gets delivered. I didnt recieve any.

What am i supposed to do?

When i try to get whats app banking the
response is
BLANK_RESPONSE
null

What am i supposed to do?

I am going to take very strict legal actions if this isnt resolved