MTN HVRC repairs confusing messages and refusal to repair

I bought a cellphone ( Samsung J2) from Markham in November 2018 for R 1 200. In March 2019 the phone could not switch on and I took to Markham in Kimberley . The phone was booked to MTN HVRC repairs with reference number 215575. I received a quotation which I rejected as I was expecting the phone to repaired through warranty. The quote was surprisingly above the cost price of the phone around R 2 500. I was informed that the phone had a physical damage and I liable for repairs. I was shocked about physical damage as the phone showed no signs of physical damage and was promised proof of such damages , I am still waiting for that proof. The consultant at Markham was also shocked at that claim of physical damage as she has also no seen such signs. I have been writing to HVRC Repair centre to explain my case but they seem not to care and do not want to repair the phone. I also received an e-mail from Boipelo Phiri dated 16 April 2019 has reference "The device has been repaired, it was marked for dispatch on 2019-04-16". This confused myself and raised hopes that my phone was finally repaired. This is the 4th month now ; I want this be resolved once and for all