Joke Collection Website - Public benefit messages - I went shopping on a platform and bought a mobile phone, but I didn't expect to send a mobile phone case. What should I do?

I went shopping on a platform and bought a mobile phone, but I didn't expect to send a mobile phone case. What should I do?

If he has admitted on the platform that he sent the wrong goods and gave you a refund of 80%, then you can take a screenshot of the chat record, then apply for a full refund, attach the chat record as a voucher and send it back to him together with the mobile phone case, and the platform will support you. If he uses other chat tools to chat with you, it will be a little troublesome. If you really dare not operate by yourself, you can directly find the platform customer service.