Third Level Support Issues

I have been having a severe issue with my XPS 9315 Laptop and the resolution. My laptop is still under warranty.  On June 18/19, my computer was on a continual loop, blue screen-try to restart, then went immediately to blue screen.  IT attempted to assist with a fix, and then it was decided that it was a hardware issue, and set up an appointment to have a tech come out to fix it the next day. The tech replaced the part, but from the minute he attempted to turn it on the issues continued. I contacted the IT department again befre the tech left and he indicated that the o/s needed to be reinstalled. No easy task when you cannot connect to the internet. Finally a new o/s system was installed and all seemed to be in order.... until 3 hours later when the blue screen returned. This started a three week ordeal during which included many many hours on the phone, the reinstallation of the o/s three or four times, essntially a try this nd seem what happens. Finally, I was escalled two weeks later to Level 3 support. I had hoped this would be it it would be fixed. WRONG! After taking 3 different types of logs, studying them, consulting other level 3 techs and a Microsoft rep, I was told they had the fix. Well, needless to say, that did not work either. 

Now the L3 resolution manager will not exchange my system when I am clearly within the warranty. She has noted that it has to be a catastrophic hardware failure. Well, if you cannot fix it with a hardware fix or a software fix, I imagine that could be considered a catastrophic failure! Now they want me to send my until back in so they can "attempt" to find the problem. Well, if all of the logs and your consultation with your experts cannot fix it I do not see how sending you the unit will. The last time I mailed a computer to a company for repairs...it was never seen again, and it took me 2 years to get my money back. THIS IS WHY i BUY THE BEST WARRANTY.

So now here I am almost 4 weeks later and this situation has cost me a signifcant amount of time and money and still no resolution. 

This really is not acceptable. I have been a loyal Dell Customer for more than 15 years, I always buy the best warranty and before this have never had a situation like this before. How much more should I have to suffer. I am stuck using a very old computer which I cannot run more than 1/2 of the programs i need as it is so old.

I have a warranty that covers everything... the software fix failed and the hardware fix failed. What else is there left to blame issue on? I really believe that this situation is a complete and epic failure. 

I am so disappointed in Dell!!!!!!! 

I need help resolving this situation.

K Hogan