|First, you haven't mentioned whether it was Norton or another company that you allowed to take over your laptop remotely. This is never a good idea, even with bona fide companies it can get you into more trouble. It is also never a good idea to post your mobile number on an open forum, yes there are a lot of nice people on here but there a re also a lot of not nice casual visitors.|
What happens when you tap F8? If you do it correctly, just after the system starts to boot, then you will definitely get the safe boot menu. The first option to hope for is the 'repair your computer' one which will allow you to try doing a System Restore first or, if all else fails, a full restore from the recovery partition. If the recovery partition wasn't put back during the refurb I would be tempted to take it back to the place you got it from and ask if they can help as they should really have given you some method of restoring things in a situation like this.
Finally, have a look for a local tech - it will cost far less than the £90 and you will hopefully get someone who isn't going to rip you off.
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd