Account closure difficulties

I've settled my Edgars account a few months ago. After that I've been receiving statements of fees that I need to pay and interest is even being charged. I don't even use my account anymore. I phoned them to close my account, after holding the line for 10mins, they supposedly transferred my call to someone else who can assist. I got cut off.... I then sent an email on 3 November asking to close my account, no response was received. I now received a new statement with a balance to be paid... again.... how difficult can it be to close an account?