About 3 weeks ago my internet took a nose dive and went from downloading to over 80Mbps down to only 26Mbps. I contacted my ISP they told me since it is showing that it's fast on their end they can't help me and basically told me to buzz off. I have a Netgear AC1450 router. So far I have factory reset my router and done the setup wizard past that I have touched nothing. Any help would be appreciated.