Poor warranty and service plans

I was forced to pay for my car service whilst the car has a warranty that is up to date. I was not advised of the service intervals by the dealership, and I called at 15k of which I booked at Weltevredenpark branch and they advised me to go to where I bought the car. The manager at Randburg kia, did not accept any responsibility, instead told me I should pay. I do not recommend anyone to use this branch,as they are inconsiderate toward their long term clients. Poor service.