Bad attitude, rude and then bribing clients to shut up

Took my car in for service and i was assisted by Willem at the Nothriding commercial park branch. Service + CV joint replacement (R5629.25) which was fully paid. I received a horrible service from Willem, he was rude to me over the phone when he was supposed to arrange someone to collect me in the afternoon to get my car. He even suggested that if i do not get my car on that day i must stand by the freeway and show my thigh and i will get a lift home. He eventually said the car will be ready by 5pm. I had to take an uber to collect my car and he promised to pay the uber driver, got there and i find my car unwashed and it still had a TPM error which i had told them to sort out. It was then he called his guys to check it out and they told me i had to come back again so they can sort it out on another day, more labour hour cost for me. He handed me an invoices to pay for my service with extra cost when questioned he demanded i pay and go with no justification. I refused to pay additional charges which he claimed insurance did not pay, which was a lie...i had the quote he sent to my insurer and they paid full amount to replace the CV joint. I was with the driver who was waiting for his money at reception and he witnessed all this rudeness/shouting from Willem. Willen then told me if i do not pay for the extra cost , then he would not pay the uber driver. Driver was shocked, and wanted his money - Willen rudely told him to get off and he will not pay. Driver simply said, its fine but i shall sue you.

I then paid him the amount for the service and waiting for my change, he kept on shouting and cursing very loud at me. I then told him i will not let him get away with mistreating people and if there are certain people he does not want to assist, he must be straight about it and not accept their business in the first place. I then told him i had recorded all our telephonic conversation (when he was utterly rude) and our conversation rite there at the reception area. He starting shaking, going up and down the office not knowing what to do with himself. He then gave me my change, to my surprise he gave me R900 instead of R25 and paid the driver and told us to **** off. i questioned large change R900 and he told us to **** off, I still have the R900 which clearly is a bribery for me to keep my mouth shut about the whole incident. I shall not be silenced by this bully and will not accept being mistreated in any form. Im utterly disgusted and very upset with the treatment i received from Auto Care and i would not wish that upon anyone.