arrogant with poor work ethics

AMG 21" I hit a pothole, Rim was handed in for repair. Be careful when collecting. While you settle your bill the staff removes the spare and mounts the repaired rim. From There I went to fir new tyres Supplier showed me the rim is not true. I take it back for 2 reasons 1 the rim is not fixed and there is over-spray on the black rim of a white color. Go back to Centurion Mag Repair the offer to fix both. 2 Days later collect the rim. I stop the staff from mounting the rim and requested the wheel to be put on the balance machine. The lady from the shop instructs me to leave the work area, I ask her how should I see if the rim is true from the outside. I stay and the rim is still not correct iput my finger on the lip and it bounces on the defect. She accuses me of moving my finger and calls the manager, I show him the same he tests the rim and yes it is still not true. He responds "This is the best I can do" . I left and took it to Reliable Mag Repair Centre Midrand 2 technissions indicate the rim is not true and that the inside lip has been cut below the save margin. They can not repaire the rim I need to replace it. Mercedes Qute R 32k for 1 rim.