How to return router? Customer service email is completely unresponsive

Title, I’ve emailed cs@gl-inet.com multiple times asking how to return routers I bought from them last week and I am not getting any kind of response. It’s been nearly a week now.

Have you checked your spam/junk emails folder?

Yes I have checked my spam folders

Hi,I have forwarded your question to the CS team. will contact you asap.