The Turkish credit cards are on the blacklist at Envato due to charge-back issues. If you were a new user, most likely your account would be blocked as well.
For work-around, you need to transfer the money from your bank to WISE/Payoneer and use their credit card for purchases.
You may try to pay via PayPal ( without loggin in by just entering your card details ) but I’m not sure if PayPal is accessible in Turkiye
