Flipkart — refund money bargeling

Sir i purchase raymond single breasted formal men blazer on 16th december but due to defective product i returned it on 19th december 2019 but till now i have not recieved my refund amount when i raise issue regarding this topic of refund than flipkart member replying me that refund already done and mail me refund refence number told me that its the fault of bank that its not credit to your bank after that i visited to bank and discuss about that topic with bank manager replying me that this reference number is not valuable for me because its the fault of flipkart afterward again i contact to flipkart member told me that file a complain regarding this the mail me a prescribed manner to file a complain i did it but nothing happened again i contact to bank but same reply came from bank again i contact to flipkat then flipkart member told me that you have to raised a dispute regarding this matter if you want to get back your money again i contact to bank but bank denied it to take any charge disputed form so now i cant understand that what can i do for getting my money refund reference number is - nft[protected]gn00095