I had my reduction done December 9th and I'm not too happy with the results. Do you think that the doctor can redo it? (photo)

Although difficult to provide you with specific assessment and advice based on the limited photograph, I would suggest that you communicate your concerns directly with your plastic surgeon. It is likely, based on the photograph and your description of concerns, that your plastic surgeon can help you with a revisionary breast reduction procedure. Make sure that you communicate your concerns/goals carefully. Best wishes for an outcome that you will be very pleased with.

I think it's a reasonable question to ask your surgeon.  Breast size prior to surgery, skin laxity, and natural shape to the breast are all determining factors in your final look. Most surgeons will work with you within a year of surgery to ensure you are happy and get a beautiful and satisfying result. 

it looks like you have sagging of the breasts again. This is difficult to predict and often due to the poor quality tissues.  A revision sounds reasonable.