Poor Billing

I am so disappointed with Telkom billing, they have set a debit order that runs on the 14 of every month for me and it is way after the agreed date of the 1st of every month. I noticed my debit order did not on the 1st, I called their call centre and was answered by a totally confused agent who did not know what a debit or credit is. In disgust I did make payment for the missed debit and to my surprise on the 14 again a debit of 1500 is taken again I call the call centre and it the dump agent again oh my good Lord I hope Telkom will look at their accounts and provide a better service. Imagine I have 4 contract with them if I am to move what will that mean to them.