Signed a one-year contract with the logistics company, and only worked for one month. Has the service fee been refunded?

Yes

The contract signed with the logistics company requires one year's information fee before going to work, 5000 yuan for 400 years. After taking office, there was no salary mentioned in the online recruitment information at that time, and the information fee could be recovered.

If he doesn't return, you can ask the labor arbitration department to return.