Horrible service

I did an upgrade with MTN direct and when I got my sim card it wasn't working. I 1st went to the MTN store in Wonderboom Juction and a Zelna assisted me by activating my sim card and she told me the package wasn't changed so she logged a call on her system. She told me I had 1Gig data. When I tried at home to connect I got a message saying my data was depleted which I don't understand because I was just told I had 1Gig data so where did it disappear to ? I went back to the MTN store today and after waiting for 20 minutes without someone greeting or even looking up at the shop full of people a very RUDE unfriendly consultant by the name of Tembani Buthelezi called me. I don't know why she did because from the start she had this horrible attitude and was very impatient and unfriendly. I try to tell her about my situation but she was so busy on her phone she finally took my sim card and said I must call 808 if I want itemised billing. I told her I don't want itemised billing because I didn't even use the sim card and she told me that she can't help me, there was no effort from her side to try and help me. I told her I don't have time for her bad attitude and she told me she doesn't have time for me either ?? Is this the way a consultant is supposed to treat a long standing loyal customer of your company ?? I have been in the service industry myself for over 25 years and NEVER have I experienced this kind of rudeness. I can assure you I will NEVER go back to that store again and I will warn my friends and family against going there as well. I still don't know where my data went because I can't find anyone at MTN willing to help me, I should have rather cancelled my contract. Absolutely shocking !!!