Got two choices here. First, keep pushing, sending follow-ups, maybe drop a friendly message every few days. Some AMs are just busy or ignore but if you're persistent enough they might bite back. Second, cut bait and move on to a new network or AM. Sometimes it's just dead weight. If I were you I'd try the first for a bit but if no response after a week or two, screw it. No point wasting time on ghosts. YMMV but patience isn't always the best route with these flaky AMs. Need a quick answer cause this is holding me back.