Don't know if you saw but Dave East is starting an ongoing mixtape series with Datpiff for up and coming artists. Details are limited but he went on instagram to make the announcement a couple of weeks ago. You can check out the official announcement from him here: https://www.instagram.com/p/CCCQoughclF/
He is apparently teaming up with Datpiff and various other entities to bring this together.
I'm all about exploring new opportunities and I wanted to share it with you in case you wanted to check it out.
It doesn't seem like there is an official way to reach out to him or datpiff but I included links to the Instagrams of everyone involved. Maybe follow the people involved, DM them, have your homies flood their comments, etc.
IG Accounts of everyone involved in Dave East's Mixtape Series
Datpiff - https://www.instagram.com/datpiff/
KollegeKidd - https://www.instagram.com/kollegekidd/
Dablock365 - https://www.instagram.com/dablock365/