I had Dysport done 2 months ago. Once it took effect, I was left with a sunken eye. Will this go away after Dysport wears off?

I appreciate your concern! Dysport does not cause a sunken eye to form. Your injection may have gotten riid of your other aging signs (wrinkles & lines) and exposed your volume loss making it quite obvious. Volume loss occurs due to natural aging. I suggest a formal consultation for dermal fillers! Good luck. 

I'm sorry you're unhappy with your Dysport treatment. The effects of the treatment are temporary will gradually fade over approximately three to four months. You should return then to your pretreatment look.

This effect will go away about 2-3 months after the injection.  The dysport effect is temporary.  Let your provider know that it did not work for you the way you had hoped and there may be an alternative approach to create the effect you want.

You, most probably had some degree of sunken eyes before getting dysport injection. This became more noticeable after injection due to elevation of the eyebrows and upper eyelids. Your condition will return back , as soon as the effect of dysport is gone.