Possible to Reverse Buccal Fat Removal?

Reducing facial volume is generally a bad thing, since this happens naturally as we age. The loss of facial volume is further worsened by the loss of collagen and elastic fibers in our skin, causing sagging, jowl formation, looseness in the neck area, and deepening of the nasolabial and subcommissural folds (marionette lines). You didn't state your age, but removing fat from your upper cheek only gives you more of the same problem you already have! (And, how do you do that without surgery, by the way?) Dr. Aldea is right, if you don't like how things look now, right after your ill-advised procedure, you will REALLY not like how things look as years go by and volume decreases more and skin sags more.

You may need judicious and expert fat grafting to restore volume, and may also need facelift to tighten and lift the facial tissues to a more youthful position. Seek an experienced, board-certified plastic surgeon for more information; more than one consultation may be helpful in clarifying advice.

Patients who underwent buccal fat removal and are displeased with the results, may benefit from other plastic surgery procedures. However without pictures of the face in question, it is impossible to asses the problem and recommend solutions. Consider updating your question by adding pictures of the face in several angles. 

You have many options. It is all about fat (or volume) in the right places. In addition to facial cosmetic surgery I do feminization procedures in the transgender population and it applies to all sexes and orientations really. The key is Hot is HOT! One good option In your case is likely fat transfer to taper back in that lower 1/3rd of the face. The upper third volume is mostly muscle (temporalis) and bone (maxillary and zygomatic). So those are structures we need and cannot really be removed cosmetically. 
Hope this helps.
Best of luck.
DrC