Punjab National Bank [PNB] — Regarding not getting refund for amount deducted

Respected Sir/Madam,
I wanted to pay through amazon using Rupay debit card on 25/11/2020 but each time transaction shown not successful and i got message of retry.But when i checked after few hours my money got deducted from my account and when i contacted amazon they told me that payment was not successful from bank side at time of placing order and they gave me RRN no. for one payment of Rs 2621 which is 898009 and for other unsuccessful payment of Rs 2621 is RRN no. 897996.Also at starting i tried to pay netmeds through amazon using Rupay debit card but it got failed and Rs 2620.87 deducted from my account but still it did not refunded back in my account.All these transactions were made in early morning/midnight 25/11/2020.I contacted on PNB customer care no. through my father mobile no.on 10th dec. 2020 and compaint regarding Rs 2620.87 was registerd with complaint no. I[protected], customer care adviced to wait for 5 days and assured that other refund will also be added into my account but it did not happen.So i again contacted pnb customer care and he told me that complaint is under process.On same day my Rs 1000 amonunt was deducted but it refunded back on 28/12/2020 back but its complaint was also registered.On 22 dec. 2020, complaint no. I[protected], I[protected], I[protected] were registered.Previously as mentioned above I[protected] was registered.Now i didnt get my three time deducted money back Rs 2620.87, Rs 2621, Rs 2621.I was told to fill dispute form at bank branch by toll free no. but bank branch dont know about such form procedure.Concerned branch tried to find about dispute form but they didnt get information about such forms.Now after 2 month my money is not refunded back due to error by bank system.I have send them email and 3 reminders but i didnt get my money back.So i request u to please help me to get refund Rs 2620.87, Rs 2621, Rs 2621 back into my account no.