Unless your slogan is patented, there is no infringement. .
The original intention of the Internet is to build a platform for * * *. . There are too many such problems. Moreover, online is too normal these days, and it is not realistic to supervise it. After all, this is the original intention of Internet products.
The only way to recommend you is.
1, negotiations to deal with this issue through negotiations, both soft and hard. It's no use just saying cruel words and asking questions. There's nothing you can do if others ignore you.
2. If the company over there is its own website, check the website for filing or something. Now the Ministry of Industry and Information Technology is very strict about filing supervision. If there is no record, you can complain to the administration.
If it's not from the company, but also from a promotion website like yours, then contact the promotion website there and ask it to cancel the promotion. Of course, this can only be achieved through negotiations.
Finally, see if the company has any good products. Suppose there is a false advertisement, you can complain through the industrial and commercial department, and you can find a way to complain about 3 15.
Finally, if your company can spend a lot of money, apply for the copyright of advertising language and sue them. But this is not necessary, just because you applied after they used it, you can only order to cancel the publicity.