Have you requested for your password to be reset? If not, I'd say it was an accident and an agent typed the wrong phone number in when trying to send the SMS for another customer. There is a chance that maybe someone else was trying to reset your password as well though so maybe jump onto Live Chat and make sure everything is ok with your account - http://yesopt.us/chat2us
Did you follow this up with Live Chat? If you still need help with this or anything else, please feel free to send us a private message and we'll have a look at your account.