For an online seller, you can first consider making a complaint through an online trading platform, such as Taobao. The key is to see which B2C platform his online shop relies on.
If third-party rights protection agencies such as 3 15 ignore it, they can consider filing a civil lawsuit. Write a civil complaint stating the defendant's name, contact information and address, and explain the facts and legal basis. After meeting the conditions for filing a case and paying the case acceptance fee, the court will file a case. After the case is filed, the court will inform the defendant, and then give both parties a month (usually) to give evidence, and then you can give evidence.
If there is no problem with your evidence chain and the validity of the securities, the court will make a judgment in your favor (the court will make adjustments before making a judgment). Then you can execute it according to the requirements of the judgment.