Black scab around nipple seems to be getting worse I think. What went wrong? (Photo)

This is necrosis of the nipple that is the result of the combination of the lift procedure with implants and compromise of the blood supply to the nipple.  It needs to be debrided, although the fact that there is an implant under the wound makes this a logistical problem.  Exposure of the implant will require its removal.

This may happen, not necessarily your surgeon's fault, which technique was exactly used to make the T pattern? I mean which vascular pedicle was used? this would be interesting to know... Robbins, McKissock, upper, Skoog, Strombeck, etc?Follow each and all of your surgeon's instructions.

Unfortunately, calling it a "scab" or "non-healing" is an understatement. It appears taht you have tissue necrosis of your areola from lack of a good blood supply. You should see your surgeon right away and get a treatment plan. This may involve removing some of the remaining sutures to limit the damage, or debriding the necrotic tissue. You need to expect to need a few procedures to fix this. 

Discuss with your surgeon if debridement (removal of the scab) is in order or scar revision and timing. Although scabs can be disconcerting the t junction is the most common area for this. Often closure after the wound is healed and possibly a scar revision can return the appearance to within normal limits.

You have partial areolar  complex loss due to inadequate blood flow in the area. y ou need to be seen by your surgeon for evaluation.  A debridement will be needed to remove the dead tissue. additionally this area will take long to heal and long term some type of revision will need to be performed. do not hesitate to contact your surgeon immediately.