Looking for surgeon to perform symmatasia correction in Victoria, Australia, suggestions?

It's best to seek a #PlasticSurgeon in the #area who is board-certified and has a great deal of experience specializing in cosmetic #surgery and correcting #symmastia. You will then greatly improve your chances of getting the result you desire, and, without the need for a revision surgery. 
I suggest that you look at before and after photos of the surgeons actual patients, and read patient reviews. Gathering all of this information will help you make a well-informed decision. Please be advised that each patient is unique and previous results are not a guarantee for individual outcomes. As with all cosmetic surgery, results will be rewarding if expectations are realistic. With any surgical procedure, there are some risks which your doctor will discuss with you during your consultation.

I am sorry to hear about the complication you have experienced. In my opinion, there is a "learning curve" with this type of revisionary surgery. The most important decision you make: select your plastic surgeon carefully (experience does matter). Make sure that he/she has significant/demonstrable experience helping patients with implant malposition problems such as bottoming out and/or symmastia.  In my practice, having used a variety of “techniques” for correction of symmastia, I find that the most reliable technique involves a 2 layer capsulorrhaphy (internal suture repair of the breast implant pockets along the cleavage area). Often, the use of acellular dermal matrix is helpful also. I have also been pleased with the (at least partial) correction of skin tenting that can be achieved with the use of the acellular dermal matrix.
Often, it is necessary to “open” (reverse capsulotomy) the breast implant pocket laterally (outer breast fold) to allow for positioning of the implant centrally behind the breast mound. This maneuver may also decrease the amount of implant pressure against the medial suture line. 
I also find that careful attention to postoperative activity restrictions is key to success with this type of surgery and other types of implant malposition revisionary breast surgery.You may find the attached link, dedicated to symmastia surgery helpful to you as you learn more. You also find a separate page dedicated to revisionary breast surgery on the same website. Best wishes for an outcome that you will be pleased with.