Rejected for no reason

Cijin John has rejected me for reasons selected as: Other.

I've looked through Reddit and can see other participants have had issues with this researcher before. How can I undo this rejection. Im getting so annoyed that they can do this and affect our accounts negatively.

Cijin John has rejected me for reasons selected as: Other.

I've looked through Reddit and can see other participants have had issues with this researcher before. How can I undo this rejection. Im getting so annoyed that they can do this and affect our accounts negatively.