Default [Q] PX C5 Rom

My crazy daughter brought this phone from a Chinese seller even though I said the money would have been better spent elsewhere.

When I remove the battery the it has this written inside

C5 TV WiFi
Model; C5 Quad Band Phone
CE 0700 ROSH
PX Phone

I'm after a new Rom as the stock one is rubbish, I'm not expecting anything brilliant but anything would be better than its current one.

I did find one on the web but SP Flash tool didn't see the phone when I took the battery out so I was unable to flash it, not sure what the problem was.