paying for nothing

Very irritated with regards to the general service I've received this year from Hyundai strijdom park. I took my car for a 60 000km service in Jan and a few weeks down the line I am left carless because of poor service that was conducted. Apparently my clutch is completely finished. Why wasn't this picked up in Jan that my clutch is nearing it's and days? I've been using all my airtime trying to communicate my concerns but either the phones have terrible connection or people refuse to call me back. I was told by your manager that your very expensive service doesn't include checking if my clutch is okay. So in essence we basically fork out 5grand just for an oil check?! I don't mind paying for a new clutch. My issue is you guys *****ing from those that don't necessarily have the means just to do quick jobs. How many times do you want customers to come for a service in 1 year. Come on guys.