Not getting what I paid for? Help??

I recently changed my plan to have 70gigs of data, since I’m using it often, but when I went to check to make sure I actually had the data, it’s telling me I only have 53gigs available, and that I’ve used 0.2 of it. Understandable, I’ve been using it because I can’t rely on my Wifi anymore, but I’m 100% certain I’m paying for 70 gigs of data and not 53, and I have 19 more days left in my current bill cycle. Am I missing something or will it just take a month for it to take affect?