Why are my undereyes still purple after fat transfer? (Photo)

I had an undereye fat transfer in July and my undereyes look so dark! I thought it was bruising that would go away by now but my undereyes seem to be getting more purple. Last week I had someone ask why I had a black eye! How do I get rid of the darkness? I feel even more self concious after the surgery. I’m not satisfied with the results.