Victim Of Credit Card ***** - No Feedback

Three months after card transactions are performed in my business by a guest, Standard Bank informs me that the transactions were **********. I have the signed slips as evidence and Standard Bank reverses the money and repays the customer without authorisation from me (the business account holder) and no explanation. Four weeks down the line, many phone calls, e-mails no response!!! ****************!!!! What are you hiding?