BBL and dents - how do I get rid of them?

Dear klawing9,
I understand your concern. However, without a proper assessment, it would be difficult to determine what went wrong. It is best that you visit your plastic surgeon for further assessment or ask for a second opinion. Only after a thorough examination, you can get proper recommendations and advice.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Allow me to answer your question as best i can without any photos. However, please keep in mind that an in-person, or at least a virtual, consultation with physical exam is first necessary before any legitimate evaluation or final surgical recommendations can be made.

You are likely in good company with many others who had high hopes for BBL but instead received disappointing results (lumpiness, unevenness, lack of projection in the central and/or lower buttock, post-deflation sagging, fatty necrotic cyst or scar tissue, etc.) as most of the fat melts away. It is not quite as much the quality of the doctor nor liposuction technique but rather the quality of the procedure that is a large part of the problem. Thus, going back for additional rounds of BBL most often produces the same disappointing results but at another financial loss.

Buttock implants, however, provide a more reliable, predictable, relatively safe, and permanent result, especially for adding projection to the buttock and often smoothing out lumpiness. Occasionally a lower buttock tuck may be advantageous for lower buttock fold asymmetries and/or sagging. When considering buttock implants make sure that the surgeon is going to be placing the implants within gluteus muscles , (a.k.a. “intramuscular pocket”), and that they are using anatomically correct, oval-shaped implants, such as Stanton Anatomic ®️ implants.
Please keep in mind that an extremely few number of board-certified plastic surgeons specialize in these buttock implants so be sure to consult with one that is reputable and experienced. Unfortunately you may have to travel long and far away from home to find this particular surgeon. Glad to help.

Photos would aid immensely in accurately answering your question. Many dents may be released under local anesthesia while others may require release and fat transfer to fill the void (usually done under sedation).
Dr. Taranow