Charged me for Greenbacks after I cancelled it

I have cancelled my Greenbacks added service very quickly after accepting it as I realised that I will not really benefit from it. Then a few months later they charged me for Greenbacks added service from my account. I don't even have the bank cards to earn Greenbacks.<br> <br> I have phoned about 4 times to cancel my greenback AGAIN and ask for my money back. Every time they say it has been noted on the system and they will get back to me to let me know. No one has ever phoned me back.<br> <br> If your bank serves the customer soo extremely poorly then there is a good reason to move to another bank.<br> <br> Please assist as soon as possible.