An injector put dysport in my upper cheeks. 3 days post, and fat "hangs over" my smile line. What are the long-term concerns?

I would expect your appearance to return to normal after the Dysport wears off from the injection you had to your cheeks.  It may take a few months for this to occur however.  

It is very unusual to have neurotoxin injections in levator muscles, but the consequences are classic and that is what you are experiencing. Once the muscle strength is regained everything should return to its baseline. Please contact a qualified provider or a board-certified physician with extensive experience in these procedures.