gearbox problem

In the last 5 days i was in St Moritz Switzerland. The first day i was there i went over a pass (Bernina)…it was so beautiful! No porche was able to follow me.On the top i stopped for about 1 hour. Then i started again…slowly to warm up, 1st gear, 2nd, 3rd screeeeetch. The leverage was in third position but no way to change any gear. Only second gear. I thing that some linkage on the gearbox is broken, because i heard metal parts going in the wheels.Now i’m waiting dealer feedback.byeNicolas