Why exactly was I banned?

I am also unable to connect. I assume that there was a server issue and main is down.
It puts me onto the fallback server whenever I attempt to connect.

Connection Lost, Kicked Whilst connected to fallback: You are not whitelisted on this server.

From what I know, this means that you aren't whitelisted on fallback and you were unable to be placed on there.

Have YOU ever wanted nether stars? Or gold? Or stacks of iron? Just ask me!Hello! As the overly excessive  title shows, I'm giving away some stuff for free. This is a special event going on from September 5th, 8:00 AM US Central, to September 10th, 8:00 PM US Central. If you want any of this free stuff (List below), contact me. The requirements are-
1. Your balance is below 500k. I will check this before giving you your order.
2. You do not have a megaspawner pass.
That's all!
Each player gets up to 5 items! (You can only pick the same one twice.)
Items to choose from listed below.
64 Iron Blocks
2 Nether Stars (Only ONE per player)
64 Cooked Chicken
32 Cooked Pork
32 Steak
64 Cooked mutton
64 Gold Ingots
64 Ink sacs
128 Rotten Flesh
6 Wither Skulls
64 Leather
6 Shulker Boxes
32 Blaze Rod
64 Redstone Dust
128 Sugar
128 Sticks
64 Glowstone Dust
64 Firework Rockets (Flight Duration 3)
64 Gunpowder
16 Ender Pearls (This does not count toward your final order. Have as many as you like)
64 Slime Balls
That's it! Your order will come in a shulker box to! It's a total freebie!
/mail send TheTechExpert Hello! I'd like to get a box of free stuff! <Order1>, <Order2>, <Order3>, <Order4>, <Order5>. Please drop it off at my house! I live at <Coordinates of house>. (You can find the coords of where you live with /coords)
Or /msg thetechexpert Hello! I'd like to get free stuff! if I'm online.
[EDIT] Please allow up to 20 minutes after I get on/ see the message to get you your stuff.