Bill is more than what the representative offered

I need internet for my kid schooling,so I chose HughesNet and give it call.The repressive offered me 19.98 dollar per month and he guaranteed it going to be the same price every month if I make deal with him at the day I called( it was August 4th). And I confirmed with him several times about if the price going to change in two years and If any other charges going to be added .He’s answer is very sure $19.98 is the final price for me.Yes,the first month was$19.98plus tax.But the second month jumped to $59.99.I called to the customer service and talk to the Supervisor.But so disappointed. The supervisor keep denying their worker used to offered that price . And he pointed that I was the one miss understood. I knew how to pronounce $19.98 and $ 59.99. I request them to review the phone records at 8/4.But he refuse and sent me on this website. I want someone from this company can review the phone records.And find out who is the one worked with me on 8/4. Fix the problem for me!!! Because lying to customer to get the contracts is fraud.Nobody like to be fooled by others!!!