Since gaming now lives at http://YouTube.com/gaming , the old Gaming app is going away on May 30th! If you were subscribed to channels in the Gaming app, they’ll automatically move to your YouTube subs feed on May 14th. More need-to-know info→ https://yt.be/help/yRe4
Sorry to hear you've been waiting so long. Could you share a screenshot of your channel's monetization page: https://yt.be/help/qCTR ? We'd like to look in to it. Keep us posted.