Trying to log on to AMC through the Watch TV link but not working

Trying to watch a show on AMC which requires log in to Verizon first but it isn't working. Verizon's site isn't sending me back to where I was on AMC, and one way or the other AMC isn't recognizing that I've logged in or already was.  Frustrating since I missed an episode and want to catch up.  Help?!  I'm starting to really miss my old provider's viewing app.