Bad service from rain...

Rain debited on my account since the 23rd of September 2024 while I have cancelled my subscription with them regarding their poor service, inability to attend clients request or queries, before the 15th of August 2024. Since 23 September they debited in my account am still waiting for refund till today, they asked for my bank statement I have sent it. They called me requesting thing they know are not available, like "they removed the Sim I was using from my account" but they say I must sent them receipt which is something they never asked for even when the Sim was active. I have sent the full bank statement and the Screenshots so many times and yet they failed to refund me.