Car water damage

I was in a rain storm at 8th January 2020 and my car shut down in the water nearby my home. The next day I phoned King price and they collected my car on the 9th January. On the 17th February they could not gave me an answer and they get hold of an independent assessor which said my car was a write of because of water damage on 5th March. King price got an independent specialist which said that my car was already damaged before the rain storm because of wrong spark plugs fitted in the engine which I disagree from them because my car was for a big service of R9000 in November and everything was fine. I had to arranged my car back to my home on 9th march when I referred my claim to the ombudsman. I was so disappointed on how my case was handled and nothing happened then during lockdown and I went directly to the manager of Ford Human Auto in Bloemfontein in 23 June 2020. They collected my car and did an inspection and said that nothing was wrong with my car and send the report to Osti on 5 July 2020. Till now I've got no response from the ombudsman or King price and 7months expired already from the insident. Ford gave me the promise that the correct spark plugs was installed and all my services was up to date. I cannot understand the delay and are struggling with transport since the insident happened on 8th January. Nobody give my the correct client service and I'm totally angry disappointed and depressed over this matter Please assist me in this matter