unlimited data

i switched to unlimited data 2 weeks ago. i was told the 2000 plan included unlimited data and i recieved a email saying that my order was confirmed and i had unlimited data for 90. then i get bill for 105 and it says no unlimited data. When i get chat they say i never ordered that  even when i told them i have email that proves i do. the chat person was very rude. then he says i have to pay another 15 dollars to get unlimited even though it says on their website that the 2000 plan includes unlimited . so now im paying 115 instead of the original 90. after him telling me that the 2000 does not include unlimited. now i go on the website and it still says under offers that the 2000 does include unlimited. I can find no way to email them to get this figured out. Im so frustrated.