Cancellation of the device

I’m so disappointed about the service I got from rain. I requested to cancel my router but they failed me.I requested this from May 2022 and I was told that it will be cancelled but unfortunately they keep on deducting into my Acc till today. Worse part is that I just received an email/ sms recently for cancellation so how ? How possible is that? I really need or want my money back please!!!! So they keep on calling me that the courier company will call me to fetch the device unfortunately they won’t get it up until I get my refund fully.