Facing issues in travis build due to migration to travis-ci.com

Hello,

I have been using travis-ci.org for build test "https://travis-ci.org/github/p-priyanka-jain/u-boot/builds" . Last month, I faced issue in syncing the git and got message regarding migration to travis-ci.com for open-source projects as well. https://blog.travis-ci.com/oss-announcement

I then used travis-ci.com for build for my last pull-request. Now its saying that free credits in travis-ci.com are exhausted.

Can anyone please guide me which site to use for travis build and how to get credit points to build open source projects.

Thanks Priyanka