Then and than are two different words, people!
Then and than are not interchangeable!
The easiest way to distinguish the difference is to say "then" is a place in time or order and "than" is a comparison.
According to the dictionary:
- at that time: Prices were lower then.
- immediately or soon afterward: The rain stopped and then started again.
- next in order of time: We ate, then we started home.
- at the same time: At first the water seemed blue, then gray.
- next in order of place: Standing beside Charlie is my uncle, then my cousin, then my brother
- used to introduce the second member of an unequal comparison: She's taller than I am.
- expressing choice or diversity: I had no choice other than that. You won't find such freedom anywhere else than in this country.
- used to introduce the rejected choice in expressions of preference: I'd rather walk than drive there.
- except; other than: We had no choice than to return home.
Got it? Now stop using them wrong.