Motorite not to paying out engine problem claim !!

I have recently bought A Car through Wesbank who sold me a Motorite policy for a specified monthly amount to insure the car against engine problems. I have owned the car for just over 3 months and have put in claim via an authorized Motorite accredited service center. I have followed all their instruction as to who to take and to and the procedure that needs to followed in logging a claim. The car was last serviced @ 69000Km and is now sitting on 83000km - I Bought it at 81000KM Motorite however will not pay out the claim based on the fact that they say the last service interval was at 2016 and it now 2019 - my service claims every 15000km.

Also there was absolutely no mention of this by the Wesbank or Motorite. A full DEKRA service test was done prior to me buying the vehicle and is Wesbank pre- requisite for private finance. Hence no problems detected. Both Wesbank and Motorite have been happily collecting my monthly installments - but come to actual payout for the claim the above issue of car not being serviced since 2016 is being forwarded as the reason for not covering the claim???? Wesbank inform me this is between motorite and me .... but they sold me the policy???