Auto Pedigree and Barons Tiquan

Good day we bought a Tiquan from Auto Pedigree in November 2019. This was a demo car with 26 000km on clock. When we bought the vehicle the radio was faulty the dealership said they will fix it. They asked me to take it to Barons cape town. They refuse to fix it says it was tampered with. I called auto Pedigree and they said I must take it to Barons Bellville. They said they wont fix it same issue. I took the vehicle back to auto Pedigree and they had stories. I then got my attorneys involved only then they collected the car and fixed it themselves, which took at least 2 months to resolve. On the 2/012021 the passenger drivers side refuse to open. My wife being stuck inside had to climb out through the drivers side. I called Barons and they gave me a date for 2 weeks time. I took the Tiquan there which os still under warranty and service plan. They kept the vehicle there for 3 days and then told me they cannot sort it out must bring it the following week. I took the Tiquan in on the 10/2/2021 they have the Tiquan there still and told me yesterday the 17/2/2021 they have to cut the door and I might be liable if the lock inside is faulty. How In the world can I be liable the vehicle only had 48000km and is under service plan and warranty. I called Auto Pedigree manager Pierre not surprised at all he sends me a message he cannot do anything as it is Barons problem I have it on record. What can I do. 1 and half months gone we paying over 8500 a month for a vehicle. What has the dealership become of.