Yes they know what dns is however they dont want to support your case. I advise you either two things: switch to alfa since its more reliable for gaming and better support or if you have a rooted android just use these commands to change to google dns
#!/system/bin/sh
iptables -t nat -I OUTPUT -p tcp --dport 53 -j DNAT --to-destination 8.8.8.8:53
iptables -t nat -I OUTPUT -p udp --dport 53 -j DNAT --to-destination 8.8.8.8:53