First of all, I haven't done a group purchase, I don't know, but online shopping is exactly the same, almost nothing.

I'll just say what I think. You can adopt it or ignore it. Thank you.

1. The other party (referring to group buying customer service) failed to communicate with you in time to update the information, resulting in your email being signed by mistake.

Second, please send a member to testify that you didn't sign the email.

Third, please provide the logistics list as further evidence.

Four, friendly communication with relevant logistics, convenient to prove his innocence.

Five, direct telephone Taobao customer service (not Taobao sellers) to explain the situation and seek solutions.

I can't think of a better way.