Poor workmanship Renault George,WC

I would like to share my experience with Renault George . My last email 10/11/2024 remains unanswered.. for obvious reasons , I would believe . Their (Renault) diagnosis for a new engine (R190k) and engine overall (R90k) seemed unrealistic , when I refused the quote and opted to sort the engine (timing issue , previous work from this very franchise) for a fraction of the price by a private ( honest) mechanic…Renault George , charged R5k for work done and put all engine parts on my Renault back seat ( bolts missing) , this at my refusal at their ridiculous quote… Please question quotes -especially at this Renault .. when engines are stripped, they have you over a barrel and tend to quote as they please ?!