A lot of digital agencies claim they have AI/ML capabilities and are really just using others' tools. It's a shame they lacked the integrity to attribute you.
It's finding value in those tools which the agency (and most others, mine included) would be claiming to be capable of and I think to a reasonable extent they've proven that, even with a somewhat underwhelming result.
This isn't solving problems, it's riding the AI wave - and claiming the capability - while leveraging the work of others, without attribution. I mean they even use the damn program in their promotional video.
I'd be much more liable to support a "We AI and you can too!" than some cynical marketing activation.