I Can't Get Twitter (X) Premium

I've been trying to purchase Premium on my Twitter account, but I keep getting an error saying 'You've changed your profile picture, username, or display name within 3 days,' even though it's been 4 days. Since encountering this error, I haven't been able to complete the purchase, and I've been waiting for 4 days now. Urgent assistance is needed. The issue remains unresolved, and emails are going unanswered. I need urgent help.