Easy. Text the word STOP to the 5-digit number that the texts came from (or if you have the bill, the second column where it lists your purchases will have your 5-digit short code to text to). That's it. That cancels it.
Tell your dad not to sweat it. He can call AT&T customer care and inquire about getting a refund on those charges. Can't say 100% they'll do it, but it worth a call. Also he can inquire about adding a purchase blocker to your line to prevent future "surprises".
My advice - if anything online asks you for your cell phone number - DON'T ENTER IT. These things happen all too often - you will get charged.
Tell your dad not to sweat it. He can call AT&T customer care and inquire about getting a refund on those charges. Can't say 100% they'll do it, but it worth a call. Also he can inquire about adding a purchase blocker to your line to prevent future "surprises".
My advice - if anything online asks you for your cell phone number - DON'T ENTER IT. These things happen all too often - you will get charged.