Incompetence on simple request

I recently opened an account at Foschini and was told that if I wanted the 6 month option that I cannot do any shopping until I first changed my account to the 6 month option. I did this the very next day by calling in at the call centre and was assured that all is now well on 6 months . I went shopping 2 weeks later and was not aware that my account was never moved to a 6 month option. Only after shopping on the card for the third time was in informed that my account is a regular 12 month account. Once again a long wait on the phone the same call centre and the same conversation ensued, only this time it was made by the store. I called in now to confirm all is well on 6 months and was told that only certain purchases were moved to 6 months and that my account has always been 12 months. Nicole tells me it can be sorted out. Can it? Really? You think you can handle that? All I wanted was a 6month account. I shopped elsewhere when I was told it was not an option. But now I would just like to close the account without even having paid a first installment.