MTN man up

poor service at MTN. On the 8th of January 2019 , I took my phone which is still under guarantee to the MTN shop in Paarl where I took out my contract. the lady inspected my phone and my problem where that the phone did not want to charge properly. she inspected my phone and send it for repairs. she inspected the phone and on al the ticks her answer on the form was N/A. Now MTN sends me a claim to pay for damages to my phone which didn't happen during my time of using the phone, suddenly there is screen damages. I went to the shop in Paarl and I spoke to the sales lady and to a lady at the repairshop on phone on which they said the damages must have happened while it where with the couriers and now suddenly I have to pay. No man MTN , do your part , every month I do mine.