I need feedback !!!!

I visited an MTN store in Canal Walk, Century City last week(22-12-2015) and was assisted now I haven't had feedback from them so I am trying to call, the number on the paper I was given in store which is *** says that my call cannot be completed so I Googled their numbers and got ***, I have been calling this number for the whole day but all it does is ring and ring and then ring some more then I got this one: *** on the Mall's website and it also rings but then gets cut-off and I get told the number is not in service *sigh* so now it looks like I have to go to the store personally to get assistance, again ... should that really be the case? I mean what's the point of all these numbers if we cannot use them?