no delivery on promotions

I received an sms from MTN stating that if I recharge with R30 MTN airtime I will receive R60 free airtime and 100 mb. I recharged with R30 but I did not receive the 100 mb nor the R60 airtime.I called the call centre to enquire, I was told to wait for 2 hours and I will receive it.I waited for 3 hours but still nothing. I called the centre again and I spoke to Mahlatsi and she told me to wait for another 2 hours,she asked me to read the sms that I had received. After I read it,she changed the 2 hour waiting period to 24 hours.She also had the nerve to tell me to go ALL the way to an MTN store and get help there, not considering how much of an inconvenience that is. Not even once did she apologise for the incompetence of MTN.she only started apologising when I pointed out that she as an MTN consultant lacked the basic phone manners, she should have apologised to me from the start and not wait for me to ask for an apology.I'm very disappointed with the service I received from MTN.