Training epic heores and don’t get them
They aren’t guaranteed. The odds for TC13, based on data gathered here on the forum, are about 95% 3* Rare and 5% 4* Epic. The odds for TC20 are better: 75% 3*, 20% 4*, and 5% 5*.
Now, if you are not receiving any heroes at all from your training, that would definitely be a bug
I dont receive heroes at all
You are aware, I assume, that it takes 48 hours to train each hero?
Have you submitted a support ticket?