Claim

I have been a client with this company since 2015 but now that i have to claim i am given a run around. My car has been consuming too much oil than normal and I took it to toyota Rivonia which they then gave me a form that we had to use to monitor oil consumption and it was etablished that something is really wrong with the car now that i want to claim from my warranty they telling me i must pay for the diagnostics which is around R5000 what is that, how will the warranty know whats wrong with the car if they wont pay for the diagnostics i mean why would i have a policy if i was willing to pay that much money to fix a car that has issues with the engen