rain abusing me

Rain is still billing me even when I requested to =stop my subscription, I called and was told my matter will be escalated and i will receive for assistance from April already and whenever I call I get the same story that my matter will be escalated but the only thing that goes up is the money they claim Iowe even though no longer use their simcard, on the 14th October 2022 I received a call from rain reminding to pay the R 2 379.55 and when i complained to that person adviced me to write am email to support and same thing happed that help is on the way but its 2weeks nothing is happening but the bill will come with the bigger amount, and whenever i ask for reference I'm told that my ID Number is my reference.