What to do if someone copies your brand
First, find out what stage the other mark is at. If it has just been published, an opposition within the 30-day window is usually the simplest route. If it is already registered, or is simply being used without registration, the options narrow and may involve a cancellation request or court action. That is the point to bring in a licensed advocate.
Keep evidence as you go: dated screenshots, product photos, invoices and any signs of customer confusion. Good records help whichever route you take.