Full signal, data won't work, slow wifi

[DJCrossFade]

Hey guys, new here, hope everyone is well.
So the last few days, I have not been able to get data, even though I have full signal and on 3g/h+ I have also been having difficulty charging, and it is slow on the wifi too, I have a feeling all 3 are linked as all the problems have began at relatively the same time.. Has anybody had similar issues? I am insured, so it's no big deal if it's nackered, just can't be bothered with all the fussing about ringing insurence, questions, shipping etc..

Thanks in advance

Chris