2 Years of little to no service and then getting charged for it

I have been with telkom mobile for going on 2 years , I set up my account for debit order and not once in these two years has a single debit order gone off my account. Early on I contact them via their "send us an email" over this issue , no contact no resolution , so i decided to pay via EFT and just leave it be. Then a few months ago I notice a "Payment rejection charge" , I contact them again , quite angry, with the same details as above.Again Zero response from the "send us an email" but this time i get a response from their Facebook account. However they fail to follow through and essentially do nothing and stop replying , so I go in store I verify the account details make sure everything is in order. Yet again this month I find a payment Rejection notice on my account and again the eft fails despite everything apparently being in order and to top it all off out of habit i still make a manual eft payment on the 28th of June and now even that payment is not reflecting .

This is by far the worst customer service around a single issue I have ever received, 2 years with little to no service , and now being charged for their terrible service just to top it off.

I have again attempted to use their email us service and the facebook account and yet strongly doubt anything will be done.