Worst Customer service

Long story short MTN cancelled my debit order and I had about 3 months remaining , I was not made aware of this and I then picked up that there was a default on my credit report - I called them for 2 consecutive months trying to pay them and they have been passing be between MTN and this debt collection agency anyway I paid it regardless , they then had their name removed from my credit file and 2 months later I pick up that they ended up back on effecting my credit file and I was just about to apply for a mortgage people don’t understand how badly this effects us. I placed them on hello Peter when this all started and I’m sorry to say they yet again *********** and the customer service is the worst they have been pasting me from one department to the next. People seriously have to better their service , they already a *******