Unhappy with implants, what went wrong & what could I have done to get better results? (Photos)

Sometimes higher profile, higher volume implants are needed to fill loss of volume in the upper portion of the breast. If you have implants, but don't feel full enough in the upper portion of the breast, considering a higher projection implant might help.
If you feel your implant moving a lot, this could be because the "pocket" where the breast implant sits might have been made too large. Increasing the size of the implant or decreasing the size of the pocket can help with this.

One's anatomy and skin quality may limit the amount of upper pole fullness. There are options to improve upper pole. Fat grafting could add upper pole volume and cleavage. Breast lift repositions one's natural breast tissue higher. Internal breast implant support with mesh may help keep the implants higher. Pocket change to subpectoral implants may help some patients.

Dear Nice667613,
I understand your concern. However, without a proper assessment, it would be difficult to determine what went wrong. It is best that you visit your plastic surgeon for further assessment or ask for a second opinion. Only after a thorough examination, you can get proper recommendations and advice.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

You did not post photos, so I would suggest going back to your surgeon and discussing your concerns. Perhaps just tightening the pockets will do well for you.