I own a 2012 Skoda Fabia vRS. Further to engine replacement due to high oil consumption, my engine has made a metallic buzzing chain like noise when I accelerate in second and third gears, up to say 4500 revs then lift of the accelerator to and allow the car to slow down on its own.

I have demonstrated it to the dealership technicians and been told it sounds transmission related. However, all they are prepared to do is plug the car into a diagnostic machine and tell me there are no faults logged. My issue is that they are not willing or prepared to check the mechanical workings of the gearbox.

I am sick of the car now as it has been completely unreliable and in and out of the dealers since I bought it six months ago. I just want it working properly or a full refund. What should I do?