Terrible service!!!

I have been a client of MTN for 13 years. Since April of this year I have been trying to change my debit order date from the 1st of each month to the 7th. The closest MTN to me is 45km away. I have been to MTN in Cape Gate, Brackenfell in April, May and July to change my debit order date to the 7th. I was told that this time the it would only be deducted on the 7th. But hey, as usual MTN didn't fail to disappoint. They deducted my debit order on the 1st of the month and now it did not go through. Not only is it the first time ever that a debit order did not go through on my account, my excellent credit history is also gone with the wind. Very disappointed in MTN. I will be taking my business and money else where. And on top off them not doing their part, me always paying every bill for the past 13 years, and the poor service I got when phoning customer services on 808, I now have to pay the penalties on my bank account as well as the account from MTN. I do believe that I do not feel like ever paying MTN anything and just moving on to another service provider. Terrible!!!! I am very disappointed in saying that MTN gave me the worst service I have ever had :(