WIMPY ROODEPOORT CHARGES DOUBLE VAT.

ROODEPOORT BRANCH CHARGED DOUBLE VAT AND MANAGER INSISTED ON PAYMENT. HAVE RECEIPT AS PROOF. TRIED 3 MESSAGES VIA WEBSITE, THEIR 'RESOLVED' REJECTED THE POSTCODE,TEL. NUMBERS UNOBTAINABLE. BILL WAS R105.74 + VAT R15.86 = R121.60. CAN ANYONE ADVISE WHERE TO GO NEXT?