Cell Zone did a fradulant sim swap on my account

Cell Zone, Polokwane, Store dealer code 137709. Responsible person noted as Dancy Tshisonga<br> This is the information on the MTN systems that was processed on an illegal sim swap on my account, I tried to contact them to find out what was going on and I was met will arrogance and attitude, in no way shape or description were they prepared to even show interest to prevent this type of fraud from happening. They spoke to me as if I was a criminal, at this point they are not prepared to speak to me any further because I am not MTN, but it is MY account that was hacked, by their store!! I guess the point they made with not even being prepared to assist in this very serious matter, certainly suggests that they are somewhat involved in the unscrupulous behavior.