Platinum repairs, bad news

I took my iPhone 5s for repairs to Platinum repairs in Rivonia, they apparently specialise in smart phone repairs. I required a screen replacement. Whilst at it I thought I would go ahead and replace the battery and ear piece. All repairs had been carried out at a cost of R2700.00. The device worked and I left a satisfied customer. 7 days later my phone stopped working completely and would not switch on. I took the phone back for an assessment. It took 3 days to get a response , as the technician said that he needed to check what the problem was. Eventually 2 technicians said that the phone was irreparable and they would need to replace the motherboard at a cost of R6500. This really concerned me as besides my screen the phone worked fine prior to their \repairs". The manager took no acountability and said that they can repair the phone and Bill me the quoted amount. I took the phone home 2 weeks later. Long story short i fixed it by plugging it into iTunes! It is working fine only to discover my camera is now not functional! I would not recommend this company to anyone."""