Bad after sales service

So here goes ,, I took my FX4 in for a service 4 months ago and after the service I noticed that the belly plates were not fitted back … so I contacted the dealership and told them of this … there reply was that they should have been fitted and could not see them around the workshop … so after all of this they agreed that it is best they replace them . I have now contacted them 20 times and months later and still no belly plates … what do I do … to top it off I had my name down for a new raptor but after all of this I will not sure if I want to with service like this … I even bought Np200s rather and a vw kombi so ford has lost out on a few sales …