[Resolved]  HDFC Bank — hdfc cc wrong deduction & relationship manager behavior

I have an hdfc credit card tagged to visakhapatnam dwarka branch ending in 6407. I paid the full due amount on credit card before due date. On due date, bank has no check on the account whether the payment is done or not and they auto deduct the total due amount from my account. However it was refunded back immediately. But due to double deduction my account has insufficient minimum balance. So the bank auto deducted minimum due also from my account.
Now when i am following up with my relationship manager "rajshri", she doesn't take my calls as she has only provided me official landline no. When she calls me back, she gives one ring and cuts the call & i get a message that my rm tried connecting with me but i was unable to attend it. She is not able to answer my questions to the queries. And also when i complained to them, they immediately auto deregistered my account from autopayment. After 2 weeks of followup, i have only received mails where they mentioned that amount is credited back to my account but it is yet not reflecting.
When i called again, they said amount will be adjusted against next payment. Neither rajshri connects me to her manager nor she is able to give me proper solutions to my issues regarding the deduction.