Unhappy banker

We have been batteling to get my husbands bank account unblocked... as it was blocked unnecessarily by a man that has bought my husbands car... i dont even know how it was possible to block his bank account... he paid the money in for the car... and took the car and the next day he blocked my husbands bank account... with numerous calls to unblock the bank account for months now... no help wat so ever from Capitec... we are not happy and wil never bank with them again...