Thanks for your reply. My phone doesn't stay on long enough, but luckily I backed it up a few days ago. Also, I couldn't restore it through iTunes because of the same situation. I completely wiped my phone through my phones settings hoping this would solve the problem, but nothing!

Since Monday evening, my phone keeps dying between 20% and 40%, when I attempt to charge it, the battery percentage will be at a random number, e.g it would say 39%, but it'd actually be 7%. Whilst I'm trying to charge it, it resets numerous times, and takes around half an hour to fully switch...