I buy license about more a week. but i don't receive my license.
Go to "My account" on the sidebar, then check the "Software license" tab. Check if it's listed in there. It's possible when you purchased the email landed in your spam folder so I would check there too.
Ah, looking into your order, it appears to be in a "Pending" state.
We sometimes see that with Paypal orders... you may want to verify that you don't see an error within Paypal.
If you don't -- you might want to just try it again, or attempt a different payment method, such as using a credit card.
If you continue to have problems, feel free to open a support ticket using the Support link above and we can provide some additional assistance.