Halo: Reach Stats

I just signed my xbox account up with this website and its saying ive never played reach before which i know for a fact is false i use to play it all the time. is there anyway i can get my stats back?

If you have changed your gamertag since you last played then your service records will be out of sync. You’ll need to boot the games up again and play something (campaign / mp / forge) for things to sync up again - that can take anywhere up to a few days to happen