“you don’t have the raw data” is really a extremely poor argument.
In fact, it implicitly assumes your analysis is correct, on the available data. He is not challenging your analysis, he just says there is data you don’t have access to that is necessary to reach their conclusions.
When they make their claims, they should present the data they think is at least enough to support them, so anyone can review the evidence and reach the same or different conclusions.
If it is enough to reach their claim ... Read even more