Angry customer Pathic service from Game gateway umhlanga

I would like to log a complain about game umhlanga. I have purchased a Samsung J7 4 months ago, now the phone is over heating and I cannot use it it's DEAD.I went to game 3 weeks ago and cz I didn't have my receipt I got a statement I'm still waiting for someone to contact me. Pathic service o have been calling almost everyday and thy say thy will call me back but never did like they show no interest. I can't believe such a big store show no interest to their customers seems like all they want is only to make money from the customers!!!!I will never recommend any1 to purchase a cellphone from them!!!! To purchase thy too fast to help but for queries we must do the run around ....