Bad service

It has been exactly 3 weeks of struggle, i requested a confirmation via email or letter advising that i only have 1 account with cotton on, even now i have received nothing, i made about 15 calls and all they have been giving me is empty promises, i called yesterday and waited for about 35 minutes for a supervisor only to be told they are nowhere to be found,

the reason for my request is because i am currently applying for an Asset at the bank and i am told the system shows i have 2 accounts with cotton on and one is not being paid which cotton confirmed over the phone that, that is not my account it belongs to someone else

@hell peter please help me obtain the letter or confirmation from cotton that i only have one account and i am paying it?