Defective Cherry MX switch on new keyboard?

Hi all,

I recently ordered a Ducky keyboard from Newegg, and it got delivered yesterday. Loving the MX browns :D

However, one particular key isn't working well, the left ctrl key. Once the key bottoms out, you need an additional 20-30 N of force before the key is registered. Suffice to say the key is effectively useless and I've been using the right ctrl for copy/pasting, shortcuts/hotkeys, etc.

Used the keycap puller to inspect, but there's no dirt/grime/dust, so it looks to be a problem internal to the switch mechanism itself. Does anyone have advice on what I can do if the seller (Pandatek) doesn't want to swap the keyboard for a new one?

Thanks in advance!