Bad Service

My Sister purchased a Demo i20, PM24LN GP at Hyundai Woodmead. Deliver was done on 24 Dec 2024, but car registration documents were only received on 5th March with the spare key. Only to find that this is an incorrect spare key. This was reported 8th March 2025. To this day, no assistance. Spoke to Chris the Manager at Woodmead on Wednesday 19 March, he keeps saying he will get back to me, called on the 20th, left messages and my details twice, no call back. Called now on 22nd March, Chris still requests my details. I feel like I am being undermined here and my intelligence is been insulted. It was not a favor from Hyundai that we purchased that car, we are paying for it, but the service we are receive is totally unacceptable. Kindly requesting urgent intervention on the matter please