How to return the money recharged in Fu You to WeChat?

I also spent 100 yuan on several medical cards. Because I didn't see that gold medal members could reduce 30 yuan, I only charged 100 yuan. Gold members only need 29 yuan to apply for a medical card, while ordinary members need 69 yuan. Finally, it cost 100 yuan to get cheaper, but it still showed 69 yuan when submitting the order. I am very angry and want to withdraw money from Fu You.