Poor customer service from Mazda Vaal, Vereeniging.

On 3 March 2020, I bought a Mazda CX3 Individual Auto from Mazda Vaal in Vereeniging. I was so impressed with the car I bought a Mazda 2 Dynamic Auto on 24 July 2020. Truth be told, both cars are fantastic and are living up to my expectations. The problem is that the dealership did not do the transfer of ownership from my name to the dealership. (Or its Proxy). I am now getting E-Toll accounts and speeding fines for vehicles that I traded in on these two vehicles. Both cars were previously furnished with E-Tags while in my possession and I never had any issues with SANRAL. Obviously, these E-Tags were officially transferred to the new vehicles as per SANRAL rules. The first trade-in vehicle was sold and registered to a new owner on 29 June 2020. I however sit with the responsibility of the period 3 March 2020 until 28 June 2020 according to SANRAL, who sent me proof that their system reflected at the time that I was the legal owner. What is really pathetic is that SANRAL now wants me to trace and find who the new owners of these vehicles are. HOW? I do not have access to the national data system! SANRAL wants me to do their own job! Vaal Mazda simply fails to answer or react on my requests and e-mails. I am bluntly ignored. Did the dealership not transgress some legal regulation/law by not taking the vehicles off my name as from the date of sale? I am sure that they transgressed some or other legal compliance. I have paid the dealership a visit on 27 August and they promised that I would get the proof of the Proxy registration that same day (I actually gave them the documentation as supplied to me by SANRAL) but I still have not received anything. I have written them an e-mail demanding positive action by 13:00 today and still no reply. What are the legal steps that I can take to bring this matter to a closure?