Issues moving Codigniter from Windows server to Linux based server

It would be great if I could find someone who knew CI that was trustworthy. I tried Freelancer for a few jobs-it wasn't worth it.
I had one job quoted at US$1000 just to start, I fixed it in 15 minutes.

I am in a bit of a dilemna, I have a customer who wants their site working, and obviously doesn't want to pay for something which they didn't do. I have also a wholesale hosting provider which has dumped server changes on me making a heap of sites need repairs. This is why I am leaving them and moving my sites. Unfortunately the guy who built the site was very loose with coding which doesn't help.

Garry Cross, Web Design, Hosting & Domains
Garry Cross Personal Computers (GXPC)