Bad workmanship, *****ing of belongings and condescending stuff

My car was booked in by insurance to renew-it rivonia for pothole damage on the rim. Upon picking up the car I noticed warning lights on the dashboard for missing wheel sensors and a lost car usb. When requesting these to be rectified and charger replaced as I was told it is in storage. Harriet later told me that things get ****** at workshop, after escalating the matters when she stopped responding to emails she then sent the wrong cable claiming it’s what I left plugged in the car even though pictures they took of my belongings clearly showed the new mercedes plugin port and connector cable. This kept going back and forth until Drienie said they will replace the charger they don’t know where it is that they wouldn’t have known as they don’t drive the new Mercedes that I should excuse them. Few days later, when the went back to them to have the missing sensor fitted it still came back with errors, mind you they even sent an invoice that they bought a new sensor. Car went to Mercedes for service only to find out the rim was not replaced but repaired and that the rear rim on the same side was buckled, to top it off the sensor was also old not new. Insurance then instructed renew-it to buy me two brand new rims, upon going back to them for the third time for rims and sensor. It was found again at tiger wheel that renew-it had removed my wheel sensor on one rim they repaired and replaced with knock-off old sensor that the car could not read. Rims got fitted and I went back to them only for a guy named Brendan to tell me I will not be assisted that renew-it did their job it’s done. Brendan said the same old sensor was new he saw it with his eyes. At this point I was livid, I’m not sure if they undermine my being black and young or it’s solely them running a slamming repair center that is approved by Mercedes yet they treat me this way. My insurance then told me to go to Mercedes and get quote to have the sensors rectified, I submitted the quote. Renew-it was copied on the same email trail to assessors only for them to say they bought it I should come again. Renew-it and it’s employees take people for granted, I was even told by Drienie that contacting the ombudsman was unnecessary yet look at them now 2weeks later with more problems and more lies, they forget comms were all on email. They forget we know our rights. I have communicated with insurance to never take my car to renew-it again and the last two times I opted to work next to my car for the rectifications but more things came up that they did wrong. Renew-it might as well operate as a s**** yard, we would then maybe understand such mediocre workmanship and incompetence of their stuff.