Adidas — Lite racer shoes

I ordered shoes from adidas, order number AIN01352735 worth 1999 rs on 28th august 2022, which got delivered in less than 2 days, due to size issue I returned it and it got picked on 12th september and reached their warehouse on 17th september and I even received text message and email that they have recieved the shoes and will initiate refund after quality check, after 2 weeks I received email asking my bank details and was told that I will received refund in 3-14 days but again on 10th october I received mail that quality check has not been updated so I should give them 4 days, I waited for a week, did multiple calls and emails, they are just giving time and time and sometimes they don't even reply, it's been 40 days since my shoes reached their warehouse and I haven't received refund