I appear to be having a problem with the traders email address

Kia Ora Maggie,

Are you the Buyer or the Seller?

What is the particular issue you're experiencing?

1. Check your spam / junk folder in case an email has ended up there from a different email address.
2. See if the Member has any listings running which you can put a prompt through the Q&A letting them know you're experiencing trouble with their TradeMe email address & to please contact you.
3. If you have no response in reasonable time you could consider placing a Feedback letting the member know of the trouble & to please make contact with you. - Feedback usually gains a response & you can edit this once the Trade is complete.
4. If you have no response to your Feedback placed file a Non Contact report for TradeMe's assistance in contacting the Member on your behalf.

You report this directly to a staff member through their Live Chat feature, entering Talk to person in the Chat window to Bypass the Bot, transferring to the staff line.

Contact our Support Experience team – Help - Trade Me

A bit more information may help us to give you further direction here also - Cheers.