Category A vehicle issues not disclosed on report.

On the 17th July I purchased a category A BMW x3 from webuycars in PE. The vehicle when driven after about 10km develops a shudder which then remains continuously, after taking it to be checked has been diagnosed, it was diagnosed to a faulty transfer case which was NOT disclosed on the deka report. I contacted webuycars and Amarah Patel contacted me and said Charleston Ruiters would be in contact, he contacted me and requested pictures and quote and said he would be in contact with the progress that was on 1 july 2023 now after numors emails, I don't get any response and just being ignored. I'm now stuck with a vehicle that I don't know what to do with and purchasing a category A vehicle I would have expected it to be as it was described. I'm really appalled by the service received and if I cant get this resolved I will have to take this further with the ombudsman.