Car wasn't serviced properly before handing it over to me

I bought a Ford Ecosport from their Dome branch in September 2022 and from the day I recieved the car, I've been having issues with it. To start there was a noise from the engine that got progressively worse, a month later (October 2022), the shocks were in a incredibly bad state and a week later the straw that broke the camels back that made me take it into one of the Innovation Groups service centers (Ford Waterfall) was when my breaks were not holding.

Before I recieved the car, they serviced it at a Bosch which I had to pay for but I'm lead to believe they didn't service it properly given the 3 problems I had noticed with it. When I took it into Ford, they said they found red sand in the brake drum which I don't understand how Bosch didn't pick up? I have been driving this vehicle on urban roads since I recieved it and I have the tracking data to prove I haven't taken it off road so I believe this sand was from the previous owner. Ford also said the shocks needed replacing which I would argue should have been picked up prior to when I came through to fetch the car. The engine noise was due to some bearing in the engine which their diagnostics found. All in all they quoted me R20, 0000 to have repairs done. Had I known this was the case, I wouldn't have bought the car in the first place. How can their service centers not pick these up?

After I called the salesman who I dealt with previously, he said I need to bring it up with Innovaiton Group. Between them and Ford I was told they wouldh't cover any of it. After much fighting with Innovation, I had to get a shock test done to see if they would cover it. Thankfully they were able to cover the shocks however I needed to pay in for the engine. So right now I am R4k short and still have faulty breaks.

I have placed two complaints with WeBuyCars and no one has followed up (besides 1 attempt which lead to nowhere). I know its the festive season and people may be on leave but I am trying to get this sorted before its too late. You guys really need to do well by your customers, give accurate DEKRA reports and service your cars properly because its unnacceptable that I need to run around getting things fixed that you missed.