How can I remove my scars on neck?

I had cut my hair on neck with scissors on that day and while cutting my hair I have also cut my skin through it so I have got those marks on my neck. I have shown to allopathic doctors and they recommended the following medicines Placentrex gel and neosporin h – By dermatologist Betnovate C cream – By physician The scars are six months old and it has not gone from the neck. Please try to help me and tell me which is the most effective medicine which will help me to cure the scar .