Appalling customer service at Wimpy Gateway Mall (Durban)

Never ever have I ever received such bad customer service at a Wimpy restaurant. To say that it was appalling is an understatement! Firstly we were given dirty glasses to drink from and when we notified the manager as she came to ask us how we were doing, there was no apology whatsoever! As if that was not enough, my sister's meal arrived with incomplete ingredients! We were told that the restaurant is short on ingredients and one of the staff members was sent to another branch to fetch them. We asked why weren't we informed beforehand so that we could change our order for something which they did have ingredients of, but again we were given a lame excuse! Such incompetence from the manager and staff members is unacceptable! On our way out at the till point, one of the staff members then looked at us and started singing "if you're happy and you know clap your hands"! The sacarsm of it all!!! I have never complained of bad customer service in my life but what I received today at the Wimpy restaurant inside Gateway Mall (Durban) was beyond the imaginable! My family and I will never eat at any Wimpy ever again!!!