@kirbymydog Don't wait any longer, file with Paypal and notify Agon asap. If you paid your Paypal transaction via credit card, you should also dispute with your card issuer.
I suggest filing the PayPal dispute via phone even though you may have to schedule a callback. This will allow you to explain the filing delay due to your attempt to get the replacement tweeters. Via online form, you'll stand a good chance that the software will deny your claim due to the delay, but their people generally will try to assist. In a similar situation, I was shocked to find PayPal willing to eat the cost of the claim and make good both me the buyer, and the seller. But you need to pursue a full refund. They might even let you keep the broken speakers too...not kidding. Cheers,
Spencer