State Bank Of India [SBI] — amount debited against declined transaction but not reversed

Address:

Sholinganallur, Chennai, Tamil NAdu, 600097

I made a payment at max fashion outlet. For first two times the payment was declined by sbi but after completing my payment with another bank's card i received messages regarding the deduction of amount from the bank.
For one transaction the amount was reversed but for another one the is no reversal status.
The merchant gave me a slip that says that payment was declined twice.