Rain refusing to cancel subscription and keeps debiting my account

I have had little to no internet connection since March 2022. I tried to get help from Rain and received no response. I tried to call and cancel but was put on hold till my airtime ran out about three times. Eventually I managed to get through by dialing the sales department and canceled the first of April cause I had enough, but I still got billed at the end of April. I canceled again straight after that and was told that my account would not be debited again, I even received an SMS confirming the cancelation, but still, at the end of May I got billed and the router was never collected. I want my money back!