Poor service at VW Claremont

I am very disappointed with service I got at VW Claremont. I did a 90 000 km service for my car there soon after I got an issue with related to water pump which they never picked up when I was doing the service on the 7th of Dec 2020. I reported the the issue to VW SA and VW NTT KWT before I reached 90 000 km on the 31st Dec 2020 but they told me parts would take 4 days to arrive by them and I had to travel to Cape Town for work on the 2nd of Jan 2021. Now I am trying to claim for the Maintenance Plan(Motorite) and they are rejecting the claim based on the fact that I have passed 90 000 km after travelling back to Cape Town. Even though I have reported the issue to VW SA and took my car for check up at VW NTT in King William's Town(KWT) before I went passed the 90 000 km mark. What is even interesting is that when VW NTT in KWT was checking the issue they said this was supposed to be picked up when the service was done at VW Claremont there is even physical evidence on the component(s)(white water marks which show the water has been dripping for sometime for water pump or whatever the part that needs to changed). Now VW Claremont wants me to pay R14 000 to replace the part(s) which would have been covered by the maintenance plan, I am not getting any assistance in terms explaining to Motorite so they can at least assist on their side looking at the situation. I tried calling even Motorite itself to explain my case, I was on holding on the call for 50 minutes for the claims department until I ran out of airtime. Can anyone please assist urgently because at this rate I even considering leaving VW for another company seeing that I am not getting this poor service.