[Resolved]  Snapdeal.com — Return and pickup related issues

I ordered my first order for combo set of two books The kite runner+ And the mountains echoed by Khaled Hosseini on 21st October, 2021 i got the item on 29th October via shadow fax courier service . I opened the package and it was another combo set of Khaled hosseini books. I requested for replacement for the order and it was accepted for return via Delhivery courier service. The replacement order was confirmed automatically after the return process. Then it was shipped via Bluedart and handed over to me on 7th November, 2021 again same set of combo was given to me that wrong one. I requested for return and refund. It was supposed to be picked up via Shadow fax courier service but the pickup was delayed and therefore
today i.e., 9th november, i rescheduled the date of pick up as i won't be available on 10th of November which is ofcourse tomorrow but the thing is when i opened the site of shadow fax it said that the pick up has been cancelled but it was not cancelled it was rescheduled. Also in the app of Snapdeal its said pick up has been failed but no-one have called me for pick up. I tried to contact so many times they didn't provide me a proper solution. They are trying to assure me with "sorry for the inconvenience caused". Is this a scam of Snapdeal?