Demeaning, Insulting, Embarassing Humiliating behaviour by Adega Manager

On Monday 1st January I 14 family members were invited to a get together meal at Adega Fordsburg at 18h00 . The table was booked before hand. The service was poor. The waitress serving us was not well trained and had to be constantly reminded to bring Cutlery etc. The most humiliating part of all was when I went to settle the bill. I reviewed the bill on the computer screen. It looked all in order and I settled the bill. I wasn't given a copy of the bill!! The next day I was embarrassed to find out that the manager, Mohammed had called back 1 of my guests and told him his part of the bill was not paid and that he must settle his part of the bill. My guest settled the bill. The Manager Mohammed was phoned and he promised to resolve the issue but 3 days later he hasn't called back. He appears ***********, junior, incapable of resolving anything. We eat several times a year as a big group at this Adega but won't be anymore.