Amazon India — Amazon fire tv stick under warranty item not replaced

I am having a amazon fire tv stick purchased from amazon.in site. The Remote was having problem, as it was under warranty so I called the customer care service of amazon, they did some test from their end and came to a conclusion that the remote needs to be changed. I asked them the replacement. They said they don't have remote in stock and asked me to purchase a new one from amazon.in site and they will reimburse my amount as soon as the item is delivered to me. But that didn't happened. After two days when I called the customer care they said I need to raise a separate request for the return of my old remote, then only they will initiate the reimbursement(This was not conveyed earlier).After that I asked them to schedule the pickup on 25th june 2022.Now today I waited since morning for the delivery person to pickup my old remote. Later at 7pm I received a message from amazon that pickup couldn't be completed as package was not ready(I didn't receive any call nor the delivery person came for pickup).Then again I called the customer care they didn't helped me in any way and said the next pickup is scheduled on 28th june 2022 and after that only they will initiate my reimbursement. Ideally they should have provided me the replacement instead of me purchasing the item and then getting reimbursement. I want my amount to be reimburse as soon as possible.