Unable to Access PlayStation Network Due to Old Phone Number on Two-Factor Authentication

Hello, I can't access PlayStation Network. My brother accidentally triggered it, and I had changed my phone number recently. Since two-factor authentication is enabled, it’s asking for my old number, which has been disconnected. I see that others have faced this issue before, but I’m wondering if anyone has found a solution or if there are people who can help. The account has a lot of games on it. I can still access the Gmail and know the password, but I can't get into the PlayStation account because the verification code isn't being sent.