KIA SERVICE PLAN NOT BEEN HONORED

I purchased a Kia Picanto in November 2019, at the time of purchase I paid R9459.37 for 3 services on the car(the 3rd, 4th and 5th) In 2020 I had two services done due to a lot of milaege been done, my car is now sitting at 75000km and due for it's last service. My service plan has been cancelled, if this is the case this is a ******* as I have paid for 3 services. The R9459.37 /3 = R3153 per service my two services did not even cost R6000- if you do not want to honor the last service then please refund me the difference between what I paid and what the services cost, I paid for this and I am entitled to have the service. It is shocking that when you call you are told it is cancelled.