locked out of Netgear C6300 modem - Time Warner Internet

This question is about "locked out of Netgear C6300 modem", with Time Warner Cable internet and apps. Username and password no longer work and password recovery page gives me the EXACT username and password I just tried. Try to reset the modem and the same thing happens, factory username and password doesn't work either.. Does Spectrum lock me out of my own equipment ????

locked out of Netgear C6300 modem?