You need to receive their evidence.

Generally, they didn't apply for trademark registration. Even if they did, according to the provisions of trademark examination, this will be judged as approximate and rejected by the Trademark Office. Therefore, they are completely infringing on your exclusive right to use trademarks.

Now you have to go to the Industrial and Commercial Investigation Brigade to apply for investigating their illegal goods, and take the notary to the notary office to take photos to get the illegal goods, and then go to court to sue. Thank you!