Transmission Slip Out Of Gear problems of the 2004 Mini Cooper

I was driving around 40 miles per hour and the car abruptly slowed down then sped up without any warning, if another car was behind me, it would have caused some serious damage. Now my car wouldn't shift shift out of first gear. I was told by my mechanic that the cvt transmission is gone. After reaching out to Mini USA, they told me they haven't had any problem with this transmission and it's pass the warranty date. If the folks at Mini USA had been honest with me I could have made the deadline for a settlement pertaining to the same problem they claimed they had no idea about. This product need to be recalled! after doing extensive research the cvt transmission have had problems all along and the company have been settling claims for quite some time. Why are they allowed to run hard working folks into death because they know most of us can't and wouldn't pursue this matter. It will cost me 6500. 00 for the part and another $2200 for labor, the car is now valued at $5500. 00. It there something wrong with this?.