non collection of monthly account

I changed my bank details early in last month to make sure that there will be adequate time for Telkom to process this and to no surprize Telkom did not collect the premium. I just received a SMS that my account is about to be suspended because of non payment. And I have to pay a double premium????In the 3 months I had my cellphone contract with Telkom Mobile you have messed up the porting of my cellphone number which I had for 5 years. you simply gave it to someone else and refused to get it back for me. I never received my first month free data and had to purchase an extra bundle. Now you can not even collect a premium. I still have to put up with you for another 21 months!!! is there something you *********** lot can process without problems? You are pathetic!!!