It's my first time linking with codemagic, and I'm trying to link my GitHub to the store, then I have received this error,
Publishing failed :| Google Play failed to upload artefacts. The caller does not have permission: { "error": { "code": 403, "message": "The caller does not have permission", "status": "PERMISSION_DENIED" } }
I think the permission for the service account to access your application is not properly set up.
I would pay very close attention starting from the 8th point in this tutorial: https://docs.codemagic.io/knowledge-base/google-play-api/
However, I also think that sometimes Google takes some time to get it going, in any case, I would retry creating the service account and paying very close attention to all the details - make sure the service account has access to the right application (also check your bundle id in your local settings etc).