Not sorting out my probleme with their service

My phone went on data roaming i called in to sort it out and got told what to do it did not work called in again and got told to do something else once again dit not word then got told i dont have data on my phone i reboted my phone again and it showed i have data. Got pictures to prove it. So i am paying for a phone thats not working and they have not done anything to sort this out feeling very fastrated cause i cant use email or nothing on the phone