Horrible service

I have been with Telkom for years. I currently have 2 contracts with them. I pay R1219. I only missed 1 payment and called them on the 2nd of July to make payment arrangement for the missed payment. I was asked to pay 40%, and the bal of R731,40 I will pay it over 2 months together with my monthly installments. I was okay with that, which I paid the same day. I was asked to call after 2 days to allow the payment to reflect before my payment arrangement can be logged. I called on the 3rd and got case NR, I was told that the consultant was going to call me to finalise the arrangement. I waited .Nobody called. I called on the 5th day only to find that there was no case lodged. I logged another another case, got another case nR. The following I received a call from collections, saying my account has been handed over to them and I owe R1940. On the 15th my account was debited by R1940, which bounce back as unpaid. My debit order date agreement with Telkom is the end of each month. The debt collection company called today asking me when I will be paying and said the balance of R1940 includes the debit order which is due end of the month.

I so frustrated I want to cancel my contract