The codes were revised in 2017, so yours may have changed.

Please try:

711215 Independent athletes performing before a paying audience

711512 independent celebrities, such as athletes, engaged in endorsement, speaking and similar services

611620 Athletic instruction

You can also look up your industry code on the Stats Can website: http://www23.statcan.gc.ca/imdb/p3VD.pl?Function=getVD&TVD=380372

Or you can use the search tools on the NAICS website: https://www.naics.com/search/