Hey WimmaDodo,
If you made these purchases through EA directly, our support team should be able to take a look at any duplicate packs that may have been accidentally picked up. This page will let you see if those can just be refunded directly with our refund tool, but if that's not doing the trick you can scroll down to the Contact us option on that same page to get in touch with support directly.
If these were purchased through a different retailer, the support team may refer you back to speak with them instead or may need some additional proof of purchase details depending on the situation. This page will walk you through grabbing that information if needed!