Poor service, unfair disconnection

Again rain has just disconnected my internet, saying I did not pay. I paid on the 26th of October 2022, then for 8 days after payment I struggled with connection. On the 8th November it started working, 15 November I was disconnected again, showing outstanding payment, then it was connected, and again today they disconnected my internet, saying I have an outstanding balance. My next payment date is 1s Dec 2022. I really don't know what's going on. And they don't respond to emails or when you log a ticket, their customer service number is never answered.