2-year AppleCare+ plan just expired, and I cannot add the monthly plan
My 2-year AppleCare+ plan just expired about 3 weeks ago on my iPhone 6s. The Apple support site and Apple's Agreement team all state that I can convert to a monthly plan. However, when I log into mysupport.apple.com, the site just says my plan is expired. there are NO options to add the monthly AppleCare+ plan. What is the exact process for doing this?
iPhone 6s