Line suspension due to VOX error

I would like to express my dissappointment with VOX. They send me a letter saying they are going to suspend my line due to not paying a specific amount. It turned out the outstanding amount was a double billing that was the the fault of VOX. I chatted to their consultants which agreed with me. I sent their accounts department a mail stating the same and I was told that they would assure that my line will not be suspended... And what happened this Saturday... LINE SUSPENDED. It's my second month with VOX and if this is our they take to their communication with clients then maybe I made a mistake going with them. This is very dissappointing. I would like my like re-instated as the error is on the side of VOX