Wireless Joint

I have torguard but have no idea how I would go about installing ii on router.

Running wg3526 and mc 7455 modem on sprint band 25

Anyone know how to get around the slow xbox connection. My download speed on xbox range from nothing to 1mb. But my router runs at about 20mb down. Something to due with double nat? Tried hooking up with ethernet cable same problem even when it's only thing hooked up.