I WILL MAKE SURE THAT MY FAMILY AND FRIENDS DON'T BUY THEIR BRAND

I bought mazda 2 2015 active in November last year ,then this year in May it fell out of warranty due to accident. So in September it stated to have a problem with the gearbox and i took it to mazda midrand and they towed the car to their gearbox specialist and the found out that the gearbox had mechanical issues and it was not damaged because of accident ,so when I ask why is Mazda not taking the blame for failure of their automatic gearbox they giving me stories like its my problem since is no longer under warranty,well i get that ...........how can i repair something that it was not proberly built by the owner??? their gearbox company is trying to rip me off by saying the amount of Repair is R47 000, imagine for a car that i bought for R200 000 in December. I WILL REPAIR IT AND SELL,THEN MAKE SURE THAT NO ONE AROUND MY CIRCLE EVER BUY A CAR BY THE BRAND OF MAZDA..........THEY CANT TAKE RESPONSIBILITY OF THEIR FAULTS