Horrible service

I am shocked with how bad MTNs services are. My uncle have been trying to get his iPad contract sorted for the past 3 months. If they don't send him to another branch then they replace the sim but yet no service still shows on the iPad. I am trying to help him. To get it fix but they only say they can't help me as I am not the contract holder. But they also don't want to help the contract holder I feel like they don't care about their customers as long as they receive their payment at the end of every month. Worst service I have seen in ages!!!