Injectable substances can reduce fat. However, they have a much higher complication rate than conventional liposuction. Most liposuction can be performed with local anesthesia or oral sedation and local anesthesia. It remains the standard of treatment.
Each surgeon will usually have their own personal office policies with regard to finances. I would have a conversation with your operating surgeon and explain your dissatisfaction with the results. Often a small touchup can go a long way. If that doesn't work, you may want to try a ...
It is very unusual for pain to worsen after the first few days post liposuction. The pain you are describing is also unusual post liposuction. I would suggest seeing your surgeon ASAP so you can be further evaluated. If you have swelling in the ankles or legs, you should probably go to an ER...