iStore Brooklyn Mall bad service

Terrible customer service, disgusting to be exact! I app**** for x2 additional lines on an existing business contract at 10:20 a.m. yesterday and have been told MTN is delaying, lies ! Then this one Catharina a service agent sends me a text that she is still waiting today at 11:20 and never bother again. I rang her given mobile number it went unanswered to my horror when I rang their call centre the store told them she has logged off and they cannot assist me now. She knew very well that I am travelling outside the country tomorrow morning at 06:00 a.m. and the lines are for my support employees! This is bad I am very disappointed I should have just gone straight to MTN. The worst the store manager told me straight over the phone that she can’t assist, such nonsense!!!