breach of customer service promise

Stood in a Q for an hour and when I got to the till point I was told to go stand in another Q as that Q was only for sassa customers. The till point next to me had a sassa signage on and not the Q I was standing in. The till operator which was the manager as well was so rude and disrepectful ans basically refused to assist me. I got so upset and called the store manager. I then had to wait for the store manager for another 30 minutes and when he got to me he just apologised and said OK HE WILL OPEN ANOTHER TILL POINT FOR ME. He opened another till point and let about 10 customers stand before me. At that point I felt like leaving my trolley and going to canalwalk where I would get better service. If it wasnt for my daughter that was so tired of waiting I wouldve left everything and do my shopping elsewhere over.. I am disgusted by the service from management.