Xiaomi India — Redmi note 9 pro Did not received my refund money from 45 days

I ordered a mobile redmi note 9 pro 4/128 (15, 999) from mi store on 26 August and on 2nd September i had cancelled the product on doorstep due to some reason but i did not received my refund money till now today's date is 12 October.i did many call many times to customer care but they did not proceed any further process. They are not responding any thing Neither any call nor any mail. Plz refund my money as soon as possible. Customer care follows only these steps create complaint id, remind complaint id and the last is highlight complaint id. I did 5 time calls to customer care . They are following the same only.