Unable to Purchase Discord Nitro Due to "Card Declined" Error

I’ve been trying to purchase Discord Nitro, but I keep encountering a frustrating "Card Declined" error, even though my account has sufficient funds—nearly ₺300. No matter which browser I use, the issue persists. I’ve double-checked every detail multiple times to ensure there are no mistakes, but the payment is still not accepted.

Unfortunately, I don’t have access to another card to try as an alternative. This situation is extremely frustrating, especially since I’ve ensured that my card and funds are in order. Discord needs to address this issue urgently and provide a solution. It’s disappointing to face such barriers when attempting to purchase a service. I expect a prompt response and resolution to this problem.