2nd Playstation 4 failure in less then a year

I bought a new Playstation 4, about 8 months later it started packing up not reading the discs giving me a message\disc not recognized"I took it back to Game they sent it to Partserve and had it replaced. about a week ago the new console started doing the exact same thing???? I paid a lot of money for this console and thought let me contact Partserve and find out whether they will replace it. They said NO they only give a 3 month guarantee on a replaced Playstation even though its brand new?!?!?!? I've had all the Playstations from 1 to 4 and sadly i don't think I'm gonna stay with them. This is really disappointing. Please can someone explain how they only give a 3 month guarantee on a brand new product that cost R 7000. 00 """