amazon india – refund not received.

Sir I am Suraj kumar. Order date 28-May-15 and order no is 171-9996318-9284331,email id [email protected] and contact no 8102408525.sir i bought yu yuphoriya at rs 6999 and successfully return it to amazon due to many issue such as proximity and heating while charging.they issue the refund on 9-july-2015.but till date today I have not received the refund in my account and even not a 91rs check which they said to send on 4 July2015 the courier charge.they say to contact the bank but the bank told me it could be due to some error or name missmach as the bank account belong to my mother and the refund was send on my name Suraj kumar.and also I bought it with debit card but they told me it has been order by net banking and the refund has been send through net banking medium but in my bank account I have not started any net banking service so,how could the money reach to me or one more reason could be the refund they claim to issued has not been issued successfully.they gave me reference no and transaction id but the bank told me I can’t track any thing with this transaction and reference no.instead of this bank ask for utr no that they are not sending to me.and now it has been happen almost a month.so,even if they have sent me any money it must have been returned to them because I have not received it.I have even send them proof the bank statement that I have not received the money till date today on 21july 2015 at 1:50pm in that it has been clear that their is no any 6999rs debited in my account.Sir my friend is Saurya Milan whose email id [email protected] and contact no is 8404992157 who has also bought a battery of 438rs which the amazon cancel it without any reason and said to give refund but he has also not received any refund in the bank account.I have also attach his order no and the reply of amazon.Sir I am completely frustrated and fedup.I have talk to their senior manager even more than 5times superviser and general assitend more than 40times.they are just stubborn and don’t respond to my query.