Account Blocked

I am so dissapointed in capotec, they have closed my account in connection with ***** I do not know of, I sell Flash and have customers sending me money via my capitec account and send them their vouchers. I went to the branch today finding out why my account is not working I waa told of that and they do not need any proof from me that I have nothing to do with that *****. Please help I really need my account to run my business and its easy with capitec, I can provide all the evidence that I only sold to the lady we have no other relationship.