Unfortunately you had some wound healing problems most likely due to decreased blood supply. You are treating the area correctly, need more time for it to heal - 6 - 8 weeks. Then may consider a revision of the scar
Your wound looks great: clean and healthy, that red tissue is called "granulation tissue" which is the predecessor of the new skin. Once the wound is covered all by the red tissue, little islands of new skin will appear and then, those islands will grow and join the others and your wound will be all covered with skin again.
Sorry for the wound issues. But all appears to be healing as normal and the care you are receiving is good....
Sorry you had such an experience after your surgery. Keep in close contact and follow-up with your surgeon-- the wound appears to be healing with the treatments she has prescribed.
Regimen that you're on seems completely logical. The healing process will be accompanied by increased blood supply to the area in question. Carry-on.
Thank you for your picture. I'm sorry that you had this complication. It sounds like your plastic surgeon is doing everything correctly. It will take several weeks to a couple months