Extended service plan

I have had an extended service pan with Liquidcapital since my car service expired and I recently renewed to a new one last year which was for 3 years, i booked my car in for service 2 weeks ago and was advised liquid capital rejected the claim because according to the age of the vehicle it is supposed to be doing the 150 000 service not 135000, my policy clearly states the intervals I'm covered for which is 135000,150000and 165000. when I took the policy my car was on 112, how do i skip from that to 150000. i am told if i cacnel the policy they are going to deduct a pro rata amount while they are the ones in bridge of contract. I am extremely unsatisfied I have refed a lot of clients to them because i have never encountered any problems with the plan i have had in the past. nowhere on the contract does it speak of the age of the car, even when i took the policy it was not mentioned. they ask for KM of the car as well as the age of the car this was supposed to have been mentioned when i took the policy.