Sony Phone

I renewed my contract late last year with MTN.<br> In December the phone went faulty(Sim would not lock in place and it would not ring). I took it into the service centre and eventually got it back on a Friday 5 February. When I collected the phone, I was told eveything baring the cover had been replaced.....Great....so I thought. Saturday morning I put my sim in to get started on my phone. The phone was flat, so had to charge it, but it would not......eventually I got it to charge on the powerbank. Brilliant first call on the phone...could not hear the person on the other side......assumed it was poor connectivity...then tried the 3G/LTE......showed it was on, but would not load any pages. (It did however work on the WiFi connection.<br> So...I promptly returned it to MTN service centre to be attended too.<br> Yesterday 18/02/2016 I get a call to say my phone was damaged and I would have to pay for the repair. This Is utter bull, as not one of the subsequent faults were there on the first repair. I was told the phone was only sent to CT last Tuesday. a week after I had taken it in. ...how`s that possible?<br> Also, how can they now say it was damaged, after 'repairing' it ?