Keep getting isp routers gateway on client PC

Alright, so i created an interface called "WAN".
I then set the protocol to "DHCP Client".
I then set the Interface to "eth0.2".
then i went to firewall settings, in the interface settings, on the "WAN" interface and put WAN in it.

I still get my ISP's DNS suffix and default gateway.

Do i need to bridge interfaces?