Really Bad Service - Not the clients fault!!!

My father purchased a Ecosport through We Buy Cars on the 15th of October he signed the contract, this car has a Warranty and Service Plan in place through finance, since we bought the car, it has been making a noise underneath the car (boom noise when you start it), we took the car for diagnostics at Ford and Car Service City in Roodepoort they confirmed that the engine mountings and gearbox mounting collapsed and needs to be replaced, but innovation is not willing to cover this nor is We Buy Cars, I have been talking to a Customer Service Agent Shane Mobaye, now it seems that she is also passing the buck and not getting back to me, when the car was bought they gave us a quote for a repair on a Bottom Gearbox mounting that was faulty on the Dekra, what I cant understand is that why was the other faulty mountings that collapsed not picked up on the Dekra... the car has not even done a 600 km since it was bought. Eddie Hannekom that was the sales guy that assisted when the car was bought is also not assisting we are still awaiting the number plates but to no avail, my dad is leaving the 15th of December and need this car to be sorted, I feel this is very unfair as we purchased the car with only the faults that they mentioned on the Dekra but as soon as we got home there were these other mountings that was also Faulty. This is going to cost between R7000 - R8000.00 to fix which I feel we should not be responsible for as it was not our fault, or will it cost me to go to the Ombudsman??