False info and dekra reports

Bought a car the 4th September 2023 on the auction after checking the dekra report. I was happy that everything on the dekra report is items I can repair. No major engine problems or oil leaks on the dekra. I paid and collected the car. Thus was an issue as it was very bad service and I complained at the time. Nothing was really dome about it. I started repairing all the items on the dekra, Tyre with bubble, cracked windscreen, rear wiper, rear shocks and mist light. Took the car for a service. Then I replaced a cracked water container (old crack not on dekra report). When the mechanic replaced the container he informed me that the car is leaking oil (old leak, not on dekra report) and agasket has blown (old problem not on dekra) and the oil is mixing with the water. I contacted We buy cars with a complaint. It took 2 weeks to get response from them after 3 attempts. Now it is 5 weeks later and they are giving me the runaround and playing for time. I requested that they buy back the car with all the expenses I had up to now or repair the oil leak on their cost. Trying to contact them is an issue and I ask the manages Shane to phone me, needles to say no call yet. The car is at the repair shop and this is costing a daily fee and the fact that for 2 months now I am without a car.