Poor service Mcdonalds Risethorpe

Poor service at Mcdonalds Raisethorpe. We used 2 vouchers ie 2 for 1 special Jalepeno burger @R29 we given only 2 burgers and the person serving us was very rude and abrupt saying the deal is one burger for R29 but we contacted call centre and they said store was wrong. Call centre then contacted store and put us through to store who still denied that was the offer abd said call centre agent did not know what they were talking about. Very digusted with stores behaviour....