Repairs of cracked S7 screen - 3 weeks still waiting

I handed in my Samsung S7 on Thursday 12 October 2017 to have the screen replaced under the warranty. I was told it will be sent to their workshop at Cape Gate and left my contact details. Still to today nobody contacted me - I had to do it all the time. I have been trying to get a positive feed back from them and was referred to the Repair centre. If you call them you have to listen to music for a long time where after being disconnected. I went after three weeks back to the shop and they checked their system. The phone was lying at their shop for a week before it was sent off to their workshop. I was given two persons to contact directly. Monday after contacting them continuously I was advised the phone is repaired and will be delivered at the Somerset Mall on Tuesday. Nobody contacted me and I went in today and it is still not there. I tried to contact the person who told me it will be delivered but he is ignoring me.