Can You Get a Refund Following an Unsuccessful Invisalign Treatment?

I started Invisalign over a year ago, and now after the 16+ months and 1 refinement, the Dentist came back to me and said that the results I want (2mm intrustion) are not obtainable from Invisalign. What? I went back into the office to get additinal impressions for a 2nd refinement. Then after 2 months of not hearing my dentist she finally called and said that a 2mm intrusion is not possible with Invisalign. Can I get a refund? I feel like I shoudn't have been a candidate in the 1st place.