Rain Bad service

Rain cancelled my sim card without my permission however they debited the full amount on the 01 Sep 2020, I have been experiencing speed issues ever since I join rain. The last person I spoke with regarding my internet speed was Faieza G (rain CeC) request number *** after 3 days my sim card was cancelled,I don't even have their customer service number they dont answer my email . I'm using this sim card to do my work as I am working from home but now I'm out of work because rain decided to cancel my sim card with full payment. Is it possible to get the proof of cancellation as rain says I cancelled, I believe to cancel the client sim card, the client must request for that.