worst service from any mtn ever

I just bought a screen protector at menlyn mall mtn and as I got home I noticed that the screen protector was cracked. I have to add that I checked in store and noticed nothing. I immediately returned to have it replaced to which the manager told me that she is unable to do returns and that i have to wait for the \accessory guy"i told them that they are making their problems mine as I am not willing to drive around for them and then she told me that it was not her problem and that she WILL NOT do the exchange. """