@Canadafett I believe Google and Apple have a short window on refunds, because that exists for players who buy an app, don't like it, and regret their purchase. Most stores have a statue of limitations on return policies for similar reasons.
In this situation, you are asking for a refund for old purchases because you believe you were impacted by cheating. That is not really the intent behind Google or Apple's refund policies, which is likely why they are referring you back to EA.
If you have information that supports that cheating impacted you directly, you could reach out to customer support and see if you can be compensated. However, just because cheating opportunities existed at the time, and you lost some battles during that time, it does not mean your opponents cheated.