Poor quality of food served and bad service

We went to eat at the Wimpy in Waverly this week (27 December 2018) and we were told about the special of the double cheese burger they had which we ordered. Food was good and so was the service. The next day we went to the Wimpy in Gezina and asked for the same special and they said they don't have that special of which we said but Waverly has it. The waiter came back and said they do have it but they took of the advert as they are running out of patties???? really you have to be kidding me, what excuse is this. We then ordered a toasted cheese and tomato - well I sent this back as there was absolutely no cheese on this so called toasted cheese and tomato. I am not sure what is happening with the restaurants lately but it seems the standards are low and the service is going backwards. We use to eat out a lot but it is like the restaurants are trying to sell the food at the same price or more but the quality is just so poor and the waiters don't know what they are serving - do they not get trained anymore? And what kind of food are the owners trying to sell.