First, you need do some some reading and research, as you don’t really seem to know what you’re doing!

Go to the support section and read the docs for unbricking (not that your router is bricked).

Have you tried a reset (directions in support)?

Try the testing firmware - http://download.gl-inet.com.s3-website.us-east-2.amazonaws.com/firmware/mt300n-v2/testing/