VOX always wasting time and giving stress

I sold my house and me and the new owner did a transfer of the modem from my name to her name, she phoned you at the time and I phoned you at the time to confirm this. Later on when I started receiving SMS's that I owe you for the modem, I phoned VOX and explained the situation, they could see this on your records and she promised to send me a confirmation email, which she did not do. I am very used to services like this from VOX having so many issues when trying to get your services at my ne house. Check your records and the phone calls and the recordings, because I will take this matter to "Hello Peter" and I will cancel the 2 x account that I currently have with VOX if this matter is not resolved. I did everything that was expected from me from the start and now this.