Amazon India — refund not processed 15 days

Website:

www.amazon.in

Hi
I have purchase sh12 wireless bluetooth headphone from amazon online on 6th december 2018 order id #[protected] — 7615519 seller was funny store which is fraud based in rajkot gujrat for amount of rs 499
I received the product on 10th of december 2018 which was faulty and in bad condition i immediately raised return request and asked for refund however after 4 to 5 days no one came to pick the product than i call up amazon i have recording adviser said he has again raised request to return and the person will be coming to pick the product in few days i waited for 3days no1 came i call up again adviser said you need to send the product back by your self and courier charges will be reversed by seller however i have also took printout of the return barcode which cost me rs 20 i have done the packing and send the product back to seller name funny store at rajkot gujrat by shree maruti courier on 16 of december at 11am i have checked the tracking # on website and it was delivered to seller on 19th december i have again call up amazon but nothing has been return to my a/c i have also send all the proof to amazon with photo copy i am helpless and so frustrated... Please help me to get my refund back
[protected]@gmail.com