What went wrong with this neck and mini lift? (photos)

I'm sorry to hear you are not being cleared for surgery.  This is not a good limitation, as most reputable surgeons will help their patients if there's something fixable post-op.  To answer your questions surely, you'd need pre-op photos and also a close up exam to see what the effect of the operation is.   Be sure to discuss with your own surgeon about how this applies to you, and whether they have any special concerns in your case.

I am sorry to read of your disappointment. Typically, it's best to wait 6 to 12 months depending on the reason for #revision. As with all #cosmetic surgery, results will be rewarding if expectations are realistic. With any surgical #procedure and #revision, there are some risks of unhappy outcome or other complications which your surgeon should discuss with you during your consultation. Your procedure should always be performed by a board-certified plastic surgeon with a great deal of experience in cosmetic #surgery. You will then greatly improve your chances of getting the result you desire, and, without the need for additional revision surgery. If during your healing, you have any concerns, it is suggested to call your board-certified surgeon or their medical staff and discuss those #concerns.

It is difficult to say without an in person examination. Possibly too much fat was removed or the platysma plication was not carried low enough. Discuss with your surgeon. Revision under local may be possible. I no satisfaction seek a second opinion.