We are new seller for Led neon store sign

Anything posted for sale on Amazon will get copied if it's a good enough seller and someone else wants to make money off of it. Many good companies with massive sales have gone out of business for this exact reason. It's almost nearly impossible to protect your products even with trademarks, copyrights and patents. If you have a good selling product you will most likely end up playing whack a mole with all the counterfeit sellers.