It's very unfortunate but such an obvious case it falls to the campaign manager, they're being paid to prevent such basic scam which includes verifying that the user is wearing the signature.

Therefore, @Hhampuz and @Royse777 must compensate the company for the past weeks or at least pay to developer (out of their own money) to create a bot to verify that users in the campaign do not modify them signature during the campaign period, any modification will be sent to the campaign manager.