Took me 5 months to get away from then, triple billed 4 months in a row requested a pac and was told that I had to pay for the arrears which was due to the triple billing, have since been told that refusing a pac isnt allowed.
Once I had removed myself from them and with a different carrier, still got calls threatening to cut me off!!
Finally managed to get them to credit all the overbilled amounts and got a closing balance of around £25 owed to them, asked for a bank paying slip as I wasnt going to allow them to have any access to bank accts or cards, wanted £15 for that, but eventually got that and paid it.
Last week got a letter telling they were sorry I had left and a cheque for £44 odd