Went to get my charging port replaced on my s5. Th...

Went to get my charging port replaced on my s5. They broke the screen and wanted me to pay for it. After arguing with the manager I ended up having to pay a reduced price but was forced to pay in cash. The screen is not as colourful as the original screen. i assume it is after market and not Samsung screen. They say they can fix any phone but don't want to assume responsibility for they're mistake. Not very professional at all