Sub-standard parts and pathetic service

I found the parts (cv-joints) supplied by Driveshaft Centre Bellville to be sub-standard and the workshop manager to be both dishonest and poorly trained in customer relations. I fitted 4 x cv-joints in July 2020 at a cost of R8000 and by July 2022 the righthandside cv-joints had failed. At first they didn't want to honor the warranty on the parts and only replaced it after I threatened to go to the media and to sue them. The cv-joints fitted on the righthand-side on the 2-year warranty only lasted 7-months. Now I ask myself how can their parts last just as long as a R500 Midas or Goldwagen part and they claim to fit "quality" parts? I might as well go back to buying Midas and Goldwagen parts and be ready to buy parts every 6 months. I would also first have my head read by a psychologist before buying into this franchise or recommending them to anybody because they're a no-good company.