Mechatronics, mechanical issues

Hi I bought an Audi A3 sedan 2014 model towards the end of April this year (2024) at webuycars midstream branch ,the car has given me problems since the first week of purchase I did inform the salesperson there in midstream branch,It has webuycars after purchase warranty,I recently took it for a diagnostic at Bosch Montague gardens here in cape town it came back with numerous problems costing at about R85 000 to fix with the warranty having authorised only R9000 I informed the salesperson in Pretoria he said I should inform the complaints department of which I have sent them e-mails without response ,it's a pity that I am residing and working here in cape town it won't be easy for me to go complain at the branch straight, please advise.my email address is ***