Worst customer service ever at Mayfair Gearbox

Worst customer experience ever. Mayfair has not been able to fix my Nissan Sentra A/T with a rebuild/reconditioned transmission for 7 months since Feb 2024. I took my car back 2 times, they sent the car back and forth between Joburg/Silvertondale, 3 or more times. It's been ducking and diving with lies and no feedback. Should never have paid them up front. I feel they are ***********, with no urge to provide quality service.