Not considering lockdown regulations

I booked in my car for service at Kia Roodepoort, upon arrival I was told I need to pay for the service as I am late. We experienced lockdown as a country so why I’m I expected to pay for the service As I was unable to book it in during that period. The lockdown ruined the month basis that I was using, My car haven’t reached 30 000 km but I’m being expected to pay for my second service. In the service book it indicates that I need to book it in either at 2 year/ 30 000km, I couldn’t book it in at 2 year due to lock down regulation but I haven’t reached 30 000km. So I don’t understand why I’m forced to pay for the second service