Disgusted with service

My mother has been having trouble with her phone since she purchased it. She has had to take in her phone a number of times since she purchased it in September last year. Nobody can tell her what's wrong with the phone and the call center are not doing anything to assist her in resolving the matter. <br> The phone has been in and out of the repair center but it's made no difference and now Sony are telling her now, sorry it's out of warranty!!! Well it wasn't out of warranty when she kept coming back for assistance.<br> The call center agent won't tell her who she can escalate the matter to and when she asked for an email he gave her a gmail account, can you get any more unprofessional than that!!!??<br> <br> Please can someone call my mother Margaret and assist her properly without giving her the run around???