Cox cable gigablast CM1000 slow - cox says contact netgear...

Paying Cox $200 a month for gigablast and unlimited data.  Speed tests are far less and when I contact cox they say to contact netgear to get help configuring my netgear router and netgear modem....   can’t find anyway to contact netgear...  just multiple shuffling to buy more support sites...  modem is new and under warranty but they won’t let me contact support.  Does anyone have a phone #?