Hi and welcome to the forum. You may want to add your rough location to your profile as this will get you more region-specific replies to your questions. Sorry to hear your driver's seat has been damaged. If you are from the UK I would suggest a DIY repair using this £38 kit. It uses the same approach a professional restorer would take:
Leather Scuff and Scratch Repair Kit
Leather Scuff and Scratch Repair Kit