Rain month-to month turns into a permanent contract without service

I took a month to month contract with Rain for limited data at R250 a month. I was retrenched in 2019 and have been unemployed since. I continued with the contract up until June or July 2022 and was unable to pay. My understanding on a month to month contract is that I wont be receiving service till I pay for my service in advance. My daughter's and my bank account is debited anytime rain feels like it. I have been suspended since July or Aug and aware of it with no expectation for services rendered by Rain. To my surprise I'm still being billed every month and now owing Rain +/-R1000. I called them on the 15th Dec at 12:38, and was bluntly and rudely told that they gave me 170mb every month therefore I must pay the full R250 per month. I told them I don't owe them anything as I'm on a month to month contract and should only receive services only when I pay.