Billing complaint

I took out a R399 deal for fibre line end of May 2022. Last month my subscription went up without my knowledge. The sales consultant assured me it will remain R399 for the entire 12 months which the contract is valid for. He also promised to cancel the month to month LTE contract which I had when this one kicks in and none of that happened. When I complained another consultant cancelled it immediately and promised to refund me and to date it hasn't happened but instead my subscription keeps going up.