RAX120 unable to connect to Armor

I purchased the Nighthawk Armor and can’t get it to work. When I attempt to access it using my Nighthawk App I get an error message that says something when wrong with my subscription activation and to call a phone number and give them the following code: “ARM-PYMT-EXP”. I have called numerous times and keep getting a run around- including escalations to nowhere. Any suggestions? My credit card was charged. I have tried a complete reset of my router and have made sure my software is up to date.