Telkom unfair/********* towards customers

Two years ago October 2019, i cancelled my service with Telkom because of no coverage. I still get a statement from them with an outstanding balance. I spoke to an agent today, 27 March 2021, explaining that i did disclose on the cancellation agreement that i had no service, but she/he (Nonjabulo Nosip) told me that they loaded the data whether or not i could use it and therefore i must still pay the outstanding R 661.7. I feel Telkom is not fair to customers. If they check my payment history, they will see that i never missed a payment, up to the last payment for which i feel i am not responsible. Can someone of Telkom contact me and credit my account with this rediculous R 661-70? My service number was: ***