Kia Menlyn client service is the worst i have ever experienced

I bought a Kia Rio in December 2018 @ Kia Menlyn first to start is that the sales person was inexperienced, i asked him how big is the engine, he told me it's a 1400 but in the end it was a 1200, so much for service, now i sit with a bigger problem i bought the car with 78000km and now the clutch is struggling and it struggles to go into gear, i did 3000 km from December to February, I took the car in so that they can fix it and now i must pay for it, that problem was there before i bought the car, and they probably just fix it so that it could hold for a while,now today they tell me the clutch is tired what the fk does that mean, i drive like a old person and I did not burn out the clutch, now the lady at the service reception said that people burn out the clutch on 150km, this is a message to Kia Menlyn i wound pay for **** so this is the first step I'm taking, I'm a big Kia fan or was, but i will not strade in or get another ****ing Kia in my life your client service is up to **** and making your problems the clients, im not going to leave it here, please Peter help, in two months the clutch is ****ed and don't tell me clients burn out a clutch on 150km or before that, making up stories is not going to get you more business, the was my first & last Kia i bought.