Unacceptable service from Mcdonalds, 4th wrong order in a row from Mcdonalds Sandton

I am shocked at the terrible service from Mcdonalds Sandton as for the 4th time in a row now my order has been wrong. I paid R88 for a chilli cheese double that cost R40 and then I still get my order wrong. I tried calling in and was put on hold for more then 10mins and still got no assistance. Mcdonalds sa do something about the service plz this is absolutely unacceptable