Help determining who sent me a text message...

I signed up for a service a few years ago when hockey was on to send me updates for all the scores and such. Well, 2 years later, I still have it and have NO idea which site it is worth (www.nhl.com, www.yahoo.com, www.tsn.ca, etc.)

All the text messages I get are from +9900000. I am not sure how to figure out who sent from that number.

Can anyone help me? I just need the origin of the text message then I can do the work with the site to unsubscribe me.

Thanks in advance

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Have you tried just to text back/reply to the number with the words "unsubsribe"?

yup - tried that - no luck

BTW - V300 on Rogers in Canada