Bad experience and tired of the issues

MTN & RewardsCo I was contacted by a RewardsCo consultant to inform me that my MTN tariff plan is no longer being done and that I had to change over to the new plan... After some back and forth, I was fed up and said okay and I asked if there will be any added charges, to which I was told "your invoice will go up by R45 only ma'am"... I then received airtime within minutes of that call ending, and yet again, I asked, will I be charged for that, and was informed, no, because you still have a few days until your new allocation, they have sent that airtime to make up for the new changes... Yesterday I received my invoice, and instead of going up by R45, it went up by R188, plus I was charged pro-rata even after being told I wont be... I've had way too many issies with my MTN contract... I personally, do not advise others to go with MTN, especially in terms of contracts! The call center as well, are never able to assist with these matters either... They will call and give a reference number, then case is closed, and nothing is done... Call are suppose to be recorded, go back and listen to what customers are being told and contract customers should be allowed to complete the course of their contract under the agreed to terms and plans until their contract period is over regardless of changes that are put into place during the period of the contract.