So, I came across this website while looking for websites that would allow you to send free text messages to any phone number. Well, in the search results I came across this site made by Bell.
Simply type in your message and the phone number your texting and then click on “I’m not a robot” and you should be able to send the message. Be sure to only send a message every 15 seconds so you don’t abuse the service. Hope you found this helpful.