Weeks & no approval from warranty, im over Hyundai

I'm actually disappointed more than anything, i had my car booked in a month ago as it had cracking sounds in the engine, i booked my car in at Hyundai Alberton and it took them bout 3 weeks to find the problem, and because in stranded with no car and im back at work they agreed that i may use the car until they get approval from warranty for the part they ordered, it's over two weeks now with no approval from warranty and i don't think it would take this long, my car is still under warranty n motor, no payments missed, nothing.. My car still makes the cracking sounds, Hyundai Alberton is aware, the warehouse manager is aware but now it's over a month now with a problematic car that's under warranty n motor which i don't think its satisfactory to a customer, im so over Hyundai i just want them to fix it so i can trade it in, im tired of calling every now and again requesting feedback it's draining.