Andhra Bank — online refund from amazon

I did 2 purchase through Amazon. I cancelled both and I got the refund of one product but didn't get the refund of second one so Amazon gave me reference number to be shared with bank which will help bank to locate the money but that will only happen if toll free number or any other customer care services replies me. Customer care number never connects. Nobody replies in Twitter and mail. I dont how will get the money.

Similarly I am facing problems while withdrawing money from any other bank ATM. I tried customer care for that issue also but nobody replies and these customer cares are out of reach of Andhra Bank. I dont what to do with this bank