There are wear springs on the new pads.
Your probably right about taking the car back but once bitten as they say.
I've no complaints on reliability of car,
I bought i40 because my old 406 was costing money to fix and I was loosing days at work because of breakdowns.
So far the i40 hasn't let me down touch wood.
I've found a kia dealer close to my work that will service with hyundai parts . Hope they're a bit more competent , if not I will be going back to them to complain.i was worried that if I complained to my hyundai dealer they would be difficult if I ever had to get warranty work done.using the old wear and tear ploy once the car was in bits.