Globe Life Insuranc false advertising, Internet

Term life insurance, which is the product you purchased through Globe, is a policy that's fixed in price for the term of the policy.  But that term is generally for 5 years, unless you buy a policy partway through their 5 year age bracket.

At the end of that term, your policy ends.  A new policy is then written, based on your new, higher, age.

So the policy your purchase at age 70 isn't the same policy you purchased at age 35 or 55 or 65.  It's a completely new policy that has those lower benefits. 

As to the 'term to 90' when it ends at 80, I can't answer that.  I'd have to look at the policy itself to know what they meant.

If you're really looking for coverage that doesn't increase in premium no matter how old you get, buy a 'whole life' policy.  These policies are more expensive than term coverage, but many will last until age 100 or beyond.

You might also consider a longer term term life insurance.  Some term policies will last 20 years or more, and may only have a minimal increase in the premium at the end of that term.  They're more expensive than a 5 year term, but may also last beyond age 80.