Forget that account, it's compromised. Unless of course your first $100 isn't "Non-Spendable", but I expect it is. If you can spend it, move it to another wallet as soon as possible.
One of the most important things in Bitcoin is to never give anybody access to your wallet.

The name is probably fake. By giving him access to your account, he probably added his own address to your account, but as "read only".

Bitcoin is legit indeed, but scammers love it just as much.
If you're still brave enough: make sure you understand what you're doing before buying Bitcoin again. The best options to buy depend on your country of residence. The most recommended wallet is Electrum. Note: do your own research, there are also fake websites trying to have you download a compromised wallet.
I think you're too trusting for Bitcoin, you should consider everyone a possible scammer.

You got scammed! DO NOT give the scammer more money!

I've seen this before: the scammer probably had you import a Bitcoin address, which creates a watch-only wallet. In other words: you can see the balance, but it's not yours. The $920 isn't yours either, and will never be yours.

Questions:
1. How did you buy the Bitcoins?
2. Who was "the guy that helped you"? How did you know him? I guess it's not someone you trust.
3. How did you create the wallet? Did that guy "help" you there too?