Nandroid Restore Issue topic

Major issue running along the lines of a few other threads I've been reading on here. I'm currently with 3 in the UK.

Phone has been working great for almost 2 years, decided to install one of the custom ROM's with KitKat 4.4.2, I was previously running 4.3. At around 8-8.30 am yesterday morning my signal suddenly disappeared. I rebooted, took out battey and sim card, left it off for a few hours but no joy, noticed I had a generic IMEI number. Managed to restore a nandroid backup I had from last year and all was well again, it was a custom rom v 4.1.2 so I tried again to update to KK 4.4.2 but same issue, no signal with generic IMEI. I then tried a different nandroid backup I had but somehow this completely scrubbed my phone. When I eventually got it up and running it was back to stock and all my folders etc have been wiped. I do have a nandroid backup on my PC and I copied it to the root of my phone but when I try and do a restore it says no files found, reading elsewhere and going off the top of my head it says it has to go to /Data/Media/Clockworkmod but I don't have a Data folder, is there anyway to get this nandroid to work?

TIA