iphone 4 problems

Im not sure whether this has anything to do with upgrading to IOS6, but my phone has got an ever growing list of problems at the moment that started before the upgrade.....

My battery will only last about 5 hours on standby and within those 5 hours i get two texts (this is while im at work, so not using the phone at all)..

Just recenty its been refusing to charge, im not sure how long an iphone takes to get to 100% but most of the time it takes nearly 2-3 hours, i have noticed it only goes up a couple of percent in the first half an hour (pretty annoying if you ask me)

My touchscreen doesn't really seem to be aligned properly, i could touch one app and the one above it or next to it will open instead.... this doesn't happen all the time but i did end up opening a bunch of apps i didn't want while trying to get the one i wanted, and i have tiny hands so im not touching the others by accident.

Freezing up all the time, and the other say i went to unlock it and it came up with the apple screen, like i had turned it on, it refused to remove from that screen untill i reset it.

i have noticed sometimes the screen will do things on its own, like try to press my password in..... maybe ive got a ghost playing around with me =/.

Unfortunatly Vodaphone wont let me upgrade for another year.... and at the end of this month will be a year since i had it, and i cant afford to buy a new phone.

Im a little bit stummped as to what to do as my nearest apple store is 20 miles away and as i don't drive not the easiest to get to, anyone have any suggestions?

(Sorry for the extreamly long essay, my phones got to the point where i want to chuck it across a field and walk away)