Not a great experience

Car had a leak in radiator/radiator hose. Michael contacted me and said that car would need a compression test for engine damage - R750. I said OK. He said engine needed repair and quoted R42000 ! That is way more than the car is worth. I said thanks but no thanks. Tried to start my car and found he hadn't put the spark plugs back in. Messaged him asking how to do this. Kept on replying that the engine needs to be repaired. No apology, no help. So R750 gave me a car in a worse stae than it was before. I dont know if this is a **** or he just genuinely doesn't give a damn. NB. I really dont know how to put the spark plugs back in. I was hoping for instructions so that I could talk my girlfriend through it - I can't do it as I have degenegative neuropathy.