Did you sign up for a party pay? $40 is the standard rate, in order to get the $25 rate you must join a 'party'.
Link to site describing party pay: https://www.visible.com/plan/party-pay
Good luck getting help with this - the website is not clear and their customer service reps are even less clear. It seems like a fly-by-night type of "business" - they are incapable of handling simple technology issues much less providing what's promised. You may want to look into switching to a more reputable carrier (Mint Mobile or HelloMobile for example).