If you send it back, be patient; If it does not vanish into Chinese black hole, you will see it again in a month.
Otherwise, have a trusted repair tech fix it at your own expense in your country or as close to you as possible.
Personally I understand that this kind of problem is an accepted part of our hobby and would have a trusted repair tech on the forums fix it on my own dime, and call it even. I would never send something back to China. Altho it is great that the TDs offer this service, I would never use it.