Bank Of India — debit card swipe through amazon pos

Address:

Avadi branch, Chennai, Tamil Nadu, 600071

Dear sir.

My acct num is [protected]. Refering my order to amazon a transaction was made on 12 feb 2019. When i made payment by my debit card through amazon swipe machine brought by their delivery person two times an amount of rs 1120 was debited from my boi account. Total rs 2240 (Rs 1120+rs 1120) was debited from my account but amazon delivery person was saying both were failed transaction. I confirmed from amazon that they have not received any credit through pos. As on today i have not got refund of rs 2240. Already more than 7 business days passed. Kindly expedite.