Hi, I'm Nathan.Sorry to hear that you're having trouble with this but I'll do my best to help you.
There is actually no cost to activate a new roku, but you do need to put a credit card on file so you have it available for any paid apps or subscriptions you may opt for later.
Did you connect the roku to the wifi already?Did it show a code number on the tv screen yet?
Do you need more help with this?
If so, simply reply back on this page.
Please note: You have already paid your fee to the site; I'd like to help you and provide value for that fee, but I do need to communicate with you here to do so.