I accidentally clicked the don't allow in subscribing a promo

[AC Question]

I was using android,I was registering to a promo then it appears "this may cause charges" then i checked remember my choice then i accidentally press the don't allow option in my messaging app...my promo last for 4 days and now i can't register...how can i fix this

 

[B. Diddy]

Welcome to Android Central! Try going to Settings>Apps>All, select Messaging, and Clear Defaults. If that doesn't help, then try Clear Cache/Clear Data (although make sure to back up any saved messages that are important to you before doing this).