PDO Threads Are Better Than Silhouette.

I had PDO threads two years ago and had great results, so I expected Silhouette Instalift threads to be the same or better. It's been four months and I look worse than when I started. I went in today and asked to see my before and after pictures and the Dr. said I needed to have more threads and the price would be $2000. I just paid $2900 four months ago and now they are wanting to charge for a redo.