Hey Filippodid.
Welcome to the Community!
I'm sorry to hear about the trouble you've had recently with your account. It sounds like our internal security system was preventing PayPal Credit from being used on your recent purchase. Payments can often be blocked or declined if we detect any unusual or suspicious activity. We decline some payments to help protect you from any possible fraudulent activity. If you've verified that there are no suspicious charges in your account, please try the payment again at a later time.
I hope this helps.
David.
