Why my money won't come in my paypal wallet?

I've just sold my 3d model for 5 dollars and my friend brought it and then i have pending balance for 3 dollars.
a few weeks later i have an earnings that available for withdrawal but when i check my PP wallet... there's no money.
in the payment method i chose paypal account and i typed my email like example (such as ----@gmail.com as match as my paypal account)
So what do i have to do?

You should contact to the support.

In the settings you need to set a minimum payout amount. I'm afraid $10 is the lowest to set. Earnings under that set limit just won't ever move. So you'll need some more sales.