Disable ipv6 on Netgear Nighthawk M2

Good Afternoon all,

TL;DR - I would like to disable ipv6 completely, even on LAN.

I would like to disable ipv6 on my router completely. Since my carrier doesnt support ipv6 (wan) yet (i live in kuwait, using Zain KW as carrier), i dont want to have ipv6 on. I have already disabled ipv6 from the APN settings. 

However, the router still provides ipv6 (lan) adresses to my devices. Thus, when i open a specific port for ssh, it opens port to the ipv6 address. I can access ssh on lan, only thru ipv6 lan address, not ipv4 lan adress. But when i try connecting to ssh from a different internet connection (using ipv4 wan adress), it times out.

I have a feeling since the router has ipv6 activated locally, it opens port for the ipv6 rather than ipv4. 

Also to confirm this, i changed sim and put my other sim from another carrier (which supports ipv6) and once i opened port, it worked flawlessly when i connected to ssh using ipv6 wan address.