When you replace a noun with a pronoun and use that same pronoun again without introducing another noun, you still are refering to the same noun you replaced earlier. Which can lead to confusion if that was not intended.
If you talk about bringing lawers in, you shift the discussion to a legal nature and crediting you on page or project has no bearing on this. Giving credits does not replace having copyright or permission. Being decent is a good idea, but having clear agreements is a good idea too. If your agreement is, being credited as "payment" for your contribution, and credit was removed, that is a breach of agreement.
Unfortunately, many people seem to think that giving credits has to do with copyright - so they could just credit something and use it for free. So for anyone reading this by chance: better check your situation carefully. And I kid you not, I have seen naive users upload other people's work and even writing about this in their profile and diligently disclaimering how this is not their work, they just uploaded it...