SAMSUNG S7 EDGE still at SAMSUNG ZA

I took my Samsung S7 Edge which had a broken screen for repairs in the Cape Town branch early this year at Century City. The next I hear is that my phone has been taken to Pretoria and the repairs will cost R7900. I told them that I cannot afford to pay that much for a phone screen. I then requested SAMSUNG to send me back my phone and when I write an email no one bothers to respond. I am still waiting for my phone to be delivered since my last correspondence in May 2018.