Three months after surgery the dog ears will not improve dramatically. The picture posted is not clear, but there might be some depression in the center of the scar making the dog ears more prominent. Get a second opnion
Scars will improve with time. But it's hard to have patience to get through this. Usually the "dog ears" will flatten out. But if they don't, then something can be done. However, it takes the skin time to heal and three months clearly wasn't enough time for you. It's ok. Hang in there as patiently as possible and wait. If things don't improve, something can be done, but don't do it in haste because it all may resolve on its own.
"This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."