Bad service

Dear Sir/Ma'am, <br> <br> Last night my husband and I went through to the KFC drive thru at Fourways crossing. We waited approximately 20 minutes in line. When we eventually got to the window to place our order the lady took our order, but when we presented her with our card to pay she mentioned that they accept cash only. My husband advised the lady that a sign should have been placed at the entrance so that customers could have been informed before wasting their time waiting in line. The lady rep**** that a sign was at the entrance. We were slightly confused because we did not notice a sign when we had entered. As we exited we found that the sign was facing backwards. There was no way that customers could have been informed before entering the drive thru. We were disappointed at the service we received.