JET REFUSES TO CLOSE MY ACCOUNT

I have been trying to close my account with Jet and have called several times with no joy. This is absolutely pathetic. Each time I call its as if I didn't call previously to close the account. There are now fees charged on my account after my account was paid up and account closure was requested. I was told that maybe the previous person didn't close the account correctly. I want this resolved asap. The worse part is that they do not provide a call reference number and each time I call the system was not updated with the fact that I want this account to be closed.