I posted same a month ago. I had a dent too. I got a replacement from dealer for £50 but that was with quite a bit of discount.
To remove use fishing line, thread it around end and work it along.
Use tardis or other glue remover to get rid of sticky backing pad.
To refit warm sill with heat gun or hair dryer. Then wet surface of sill with warm water with a couple of drops of washing up liquid. Peel backing paper of new badge and apply, the soapy water will allow you to float new badge into place. Warm it again until water evaporates......bingo, job done.