BAD SERVICE Hyundai Boksburg

Hyundai Boksburg. What a unpleasant experience. Bought a double deal 21 December - Sante Fe & i20 (both 2013 models). Also bought on both extended service plans. Yesterday, had a trip and the car (i20) turned over 90000km. I took out the service book, and to my shock it was serviced last on 71k km. So I phoned Hyundai Boksburg to make a booking, confirmed the service plan, and took it in this morning. I want an explanation why it was not serviced before they sold it to me in the first place - as I bought it on 88511km......... and now being phoned to say there is no service plan??!!!!! Shocking service.....