Impossible to close a TFG account

Is it not at all possible to close a TFG Money Account? I am struggling for 5 years to close this account; there has been no activity on this account for 10 years. I sent numerous emails to ask them to close the account, yet I get billed every month for a R31.44!!

If I refuse to pay, they threaten to hand me over to credit bureau

This is just frustrating