Discovery technicians turn my brand new VW T-Cross into a second hand s****

I called Discovery today and got sent from pillar to post. No sense of accountability and the agents I spoke to don't know what they are doing. I bought a brand new VW T-Cross in Feb 2022 last year and continued with my insurance with Discovery with my new car. They installed their DT tracker and within 3 months my car insurance doubled because of 'price of everything is going up'. My insurance went from R990 to R3200 what a joke so I canceled. Joined King Price which has been giving me excellent service thus far. I had Discovery remove their DT tracker and over time my car radio/comms system started failing. My radio took 30-45 minutes to switch on. Now I haven't had a radio for 2 months and bluetooth phone and usb port are not working. VW says the Discovery people who removed the tracker messed up the wires, despite me paying over R2k for warranties, maintenance plans, service plans etc I have to pay for Discovery's tracker people messing up a brand new system in a brand new car. So with all the insurance I'm paying for VW cannot fix something that has been tampered with. They sent me shocking pictures of how my wires were cut when Discovery was removing the tracker, they completely f*d up a BRAND NEW CAR. Can someone recommend a lawyer I can speak to to take legal action against Discovery if they do not repair the damage their technicians caused to my car.