I don't know what happened from the description. On the face if the scar has not healed well a scar revision can be performed and there is a new system for scar treatment, Embrace, that is only available to Plastic Surgeons which I use for scar revisions.
There are a variety of methods to improve surgical scars. Scar revision involves cutting out the scar and re-stitching the area although this puts you at risk to get a similar scar because the same factors are likely involved in the healing process. Lasers can be used to blend the scar in a non-invasive fashion. In my experience topical products have no to very minimal benefit in scar improvement.