Hi Muppitz ,
Don't mess about with it - take it back to the shop.
ask them to fix it - failing that you need to find a luthier
(some one who makes /or mends guitars and associated instruments).
It could be many things or a combination of some and you'll never sort it out.
Beardedbruce has only asked you two things which could be wrong -ther's loads more
Luthier /guitar doctors are not so difficult to find .
Try starting a new thread "Luthier required near xxxxxxx area "
They'll sort it out in 10 mins , and e.g. if the neck
is twisted they'll tell you get it straight back to the
shop get your money back ,or a different guitar as it maybe unplayable .

Chances are , it just needs setting up properly so
I'm afraid an hour or two back on the bus is on the
horizon - you'll be glad you did .
Best of luck.