Copyright protects your original creative expressions.
If you can show you were the first to use this unique name and I.D. then you can assert copyright ownership. Presumably, since it was used online, that would not be difficult.
You would start by sending out a cease and desist letter to the company to demanding they stop using the copyrighted name, etc. and warn they will be liable for damages if they do not.
Then, if they do not stop, you would sue to be awarded damages for the misappropriation of your property.
You can do this yourself, but retaining an attorney is strongly recommended, as intellectual property claims are complex in nature.
If you need assistance finding local counsel try Martindale Hubble (site rules prohibit us from referring specific attorneys). Many attorneys themselves use this site to locate attorneys outside their jurisdiction or expertise:
It is a huge worldwide database searchable by location and specialty. The attorneys are peer rated. So, they represent the top of the profession.