Options for shrinking breast after 2nd breast fat transfer for reconstruction with implant? (Photo)

Fat transfer for breast reconstruction dying. This is my second fat transfer to my left breast for reconstruction with implant after mastectomy. About 9 months after the transfer, my breast started shrinking and has continued to shrink to the point where my left breast is a full cup size smaller than the right. It first of all is concerning me, secondly I want to know the best options to fix the issue. Increasing the implant size or more fat transfers. Or other options? Thanks!