You haven't ruined your muzzleloader; you have ruined your life. Now you are going to have to spend untold hours on internet forums, then you will accumulate vast quantities of "gear" such as horns, bags, tools, extra parts, etc. All of that leads to another gun, then another, then another....so forth and so on. First thing you know you will start looking at kits because you begin to realize that you can build a better gun than you can buy, then the kits won't really be good enough and since you have by now accumulated a supply of tools, you will start building from a stock blank. You may even have a brush with some living history folks along the way which is another large branch of the tree.
You have an exciting and wild ride ahead of you, my friend. Hold on tight and enjoy, and don't forget to take lots of pictures.