VPN connection drops every several minutes on my AC1750

after warranty period, they basically ignore me now. my problem is still not fixed. I factory reset the router, reloaded my backup config. My VPN doesn't disconnect now on 5ghz wifi band(used to do it all the time), but yesterday, my ISP changed the ipaddress, my router didn't even know it's not able to connect anymore (white light indicator instead of orange).  Had to reboot it manually again. It doesn't even have a scheduler i can configure to auto-reboot so i'm ready to trash this piece of junk! Stay away from this costco netgear nighthawk R7900P router. No ssh funtionality so i can't even set a cron job to reboot. Also at times, some wifi devices like thermostat, cameras loses WIFI connectivity. I highly suggets you find another brand coz i spent close to $200 for a piece of junk with mediocre support!  I have the latest firmware, even tried a test firmware they sent me, all no good.