poor service

I have taking in an item that I bought in 11.12.2015 to game cause it stopped working. I took the item in on 07.02.2016. They took it in for repairs and sms me to pick it up on the 24.02.2016. I asked them to test it and they refused me saying it is right. I had to wait for my wife to come home from work cause I don't know hoe this item operates only to find out as soon as she put it on the power cuts. I then contacted customer service on *** and spoke to Herman. He said that someone from management will call me after investigation and till now I have no response. Is this the kind of service a big company like Game give to there customers. I would of been happy even if someone return a call to me telling me, that they are working on my problem. At this stage I am disappointed in Game Witbank together with Game Head office. Please assist me in this matter Peter.