Hair transplant recipient scarring. What are the options to fix the scarring?

Hello, I had a hair transplant about one year ago. Unfortunately, the results weren't adequate and the recipient area is still somewhat red, and also appears to b slightly raised relative to the surrounding area. Is this a definitive sign of technically faulty surgery, and what are the options for fixing the scarring? Is a second hair transplant necessary t conceal the damage, or would another treatment work better?