Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
First, let me apologize that no one responded to you sooner. If you would like to cancel this service now, send a reply and I will send you the refund link.
If however, you would like help with this issue then I need to ask you some questions. Starting with, whats the version of windows that you have on your computer.
Windows xp, vista, windows 7, windows 8 or windows 10?
Also, what exactly happens when you try to turn the computer on now. What does it say on screen, does it show any error messages, etc.
I need to know the current status of the machine so I can help you get them running again, thank you.