VERY BAD ACCOUNTS DEPARTMENT

when i started with home connect in 2018 everything was going well, until they day i decided to move, this is when all the problems started, first they messed up my installation, then thye said i have to cancel my current line in Florida, which i then went to go do online, i was billed in February, March and April with the correct amount, now in Mya, they want to bill me for the house in Florida and the new house, i phoned them they want me to send them proof of the cancellation, i went on the website to see for the proof but the website dont provide me the with proof. why would i want to keep the line at the old house and the line at the new,where i will only be using the line at the new house, if they dont sort out the issues then i will payt whever neccessary and look for another service provider.