I think it would be better to own up your mistake and move on, and perhaps, you'd be forgiven by your campaign manager, community or whoever else. The deleted posts were 100% written by an AI software, I can distinguish if it's written by AI without even checking it with any kind of scanner. Most of the times I'm on point, I've reported a handful of users in the past and can now recognize them with decent accuracy. You've been caught, and this isn't the first time either. You don't seem to be learning from your mistakes.
You are entitled to your opinion, but I will not be pressured into admitting to something I did not do, and if the manager is fine with whatever the website detector report says, she can remove me; I do not want to be the reason the campaign is receiving negative energy. This is not pride; it is understanding who you are and not allowing others do it for you.