Car service are idiots that make me pay for their errors

I had my towed to 2014 Kia Rio Sedan towed as my car needed repairs. Kia told me the clutch needs to be replaced. This cost R9900.00 which I gracious accepted. I collected the vehicle and made the payment as advised. On Friday 17 August 2017 after after two days of driving it, I felt the gears were stiff and and notified Yvette from Kia Centurion. She advised that I return the vehicle gor an assessment which i did on Monday 21 August 2017. The mechanic drove the vehicle in my presence and confirmed that the gears were stiff. I was asked to leave it for the day. After driving the car for 2 days i realised that the issue was persisting so i returned it to Kia. They damaged my gearbox and requested i pay for a car hire of R1500 which is refundable which i accepted as i need a vehicle. Europcar finally at 3pm on a Friday to offer me a Chevrolet/Picanto/Hyundai i20. Which i graciously declined as i require a bigger vehicle for my needs. I was addressed in a rude manner and lady at reception hung up the phone on me twice. If this is how Kia treats black customers i feel sorry for them.