Bad workmanship Killarney Authorised Huawei repair shop

I'm very disappointed with your Authorised repair shop in Killarney Johannesburg i took my phone for repair i was told it will be ready in an hour i was shocked but happy at the same time. I went back after 1hr 30 minutes my phone was still not ready i was told to wait 5 minutes i did and the guy call me i went to get my phone it hada marks of glue and i saw open space on the side it have small elastics around it i was told to keep them for 1 hour i told the guy who's the owner of the store i wasn't happ6 about the opening of the side as i have before taken my phone to Huawei repair shop in merlin Pretoria they did wonderful job. He said my phone is not straight i paid R850 now after 3 hours the screen is lift up i can see light under the screen i need my money back please do something about this shop