Ongoing technical issues for 2 years

I bought a Dell XPS which is an extremely expensive piece of equipment, just months after I bought it I had issues. It has a service plan, a technician came out and replaced several bits. Shortly after this it started giving trouble again, eventually again I contacted them and they replaced some more parts. Again it started giving trouble. Through email discussions a Dell OS Recovery and restore USB Key was sent. I followed the instructions to the letter T, it seems it did detect a number of issues which it could not fix. At the end of the process you are supposed to remove USB and restart. Now it won't start up and I have no PC. Phone Dell and they pass you around and place you on hold for hours, I am now sick and tired of this awful product and want it replaced!