P20 Pro Call Issues and poor service form Huawei Canal Centre

I left my phone for the manager Mario to have a look at it as he promised to do. This is after I had originally booked my phone in to have it checked out as I was having issues with phone calls not connecting. that said I should return in an hour which I did and was advised that they just reset all the connections. While still in the store I checked to see if the problem was resolved. It was not and the lady took it back inside to the technician where he was going to open it but 5 min later she came back saying that there was a crack on my camera which was not there before, because when I handed it in there were no cracks on my phone because they normally check the phone and make notes of anything that may be wrong. I took the phone back as they wanted to charge me over r2000.00 to have the back replaced before they could open the phone. I then wrote to the Manager, a Mr Mario Bohardien who advised that he would get back to me within 24 hours, which he never did. I was at Canal Walk 2 weeks ago an bumped into the manager who said I must bring the phone in as he will see what he can do. I specially went back to the store to do so, That was the 30th of June. I am still waiting to hear what is going on with my phone.