如果升级Pro后，发现chatgpt网页端无法使用Pro模型，可以通过提交退款邮件的方式，来减少账号损失 
邮件模板如下 
Hi Support Team,

I would like to request a review and full refund for my ChatGPT subscription. As requested, I have attached the receipt for this charge to proceed with the manual review.

I paid for this subscription on the ChatGPT web app using my [卡类型，如 Mastercard / Visa]. However, this upgrade was made by accident — I did not inten...