Options for Correcting Bad Blepharoplasty Results?

It is not easy to recommend what exactly needs to be done in your case but here are a couple of ideas.
Secondary lower blepharoplasty commonly requires some lid tightening (canthoplasty or canthopexy) in order to prevent droopiness (ectropion).
Scar removal/improvement requires another incision under the lid lashes (skin/muscle flap approach); likely with canthoplasty or -pexy.
Most patients benefit from filling the tear trough area rather than further fat removal. This can be effectively doen with fat grafting. Sometimes, conservative fat removal from isolated "pockets" is helpful.
It is commonly a good idea to see your original surgeon in follow up. You will certainly not regret seeking another opinion before going ahead with secondary blepharoplasty.

There are many options for correcting bad blepharoplasty. However, blepharoplasty correction requires specialized training and experience. Be certain to look at many, many photos and to carefully check the credentials of your plastic surgeon.Whether or not to continue with your plastic surgeon depends upon whether or not you still have confidence in your surgeon. It is important to discuss your concerns. It is possible that your plastic surgeon might be right for you. If you elect to find a new plastic surgeon you will need your compete medical records including all pre and post operative photos to help a new plastic surgeon with a surgical plan.