Won't pay service

purchased a vehicle at hyundia Springfield on the 1st of Feb 2021 it was a pre-owned vehicle with 23 000km on the clock yesterday I took my vehicle for service as it had reached 30 000k and they told me I have to pay for the 30 000k service cause I'm only covered from 45k if I don't pay my warranty will forfeit it doesn't make sense cause it's only been 2 months with it and already I have to pay for service on the service book vehicle only has a stamp in the 15000 k which was done in the 21. 08 2020 now why and how come hyundia has me skipping a service and telling me to pay

From my knowledge I have to be covered for 2 services 30kand 45k then I start paying from the 60k

Hyundai need to ammend this and let the service plan start from 30k

I'm really not happy with this issues it needs to be fixed now I can't drive the car cause it will exceed this 30k without me servicing cause I don't have R3000 to pay for service n I don't want to ruin the warranty

I have attached pictures of the service n the invoice that has only 1 service done