TFG bad customer service

I had a contract with one2one under TFG account, I cancelled it in JAN then my number went off on the 22nd of FEB and it has been off ever since. I have been trying to get hold of them via emails and telephones but their lines are forever busy and I get autoreply email. I tried to reach out to TFG for help but they also put me through the same number of one2one which is forever busy while I explained to them that the number is forever busy. I called 5 times and went through the same thing