So mad!!!

We bought our Nissan Qashqai 2015. Best car that I ever had. However I am so mad that Nissan let us bought the extra pack with the mags which I thought would be nice. Now after 35000kim it seems like my tires are finished witch is also a bit to early. I started phoning for prices and could not believe what I am hearing the price for one tyre R4500.00 how is this possible and worst of all no one have stock of this as it seems that no one is making these tyres except for Continetal who also do not have stock. the size 225/45R19. Why did no one informed us on this I mean to buy a car is a huge thing financialy and now this surprise R18000.00 for 4 tyres after only 35000 km this is really a huge thing for me. And must I now advertise everywere that people must please not buy the exstra packs as this is really a money making thing. Please I want answers on this??????