Opening a dispute was the right move. However you shouldn't of gone along with leaving feedback for an unreceived item. By paying through paypal, you have satisfied your end of the transaction until the item is in your hands.

I am currently in a dispute with a seller who I bought a Euro Overlord from but has stopped all contact. It's been a month and there is no item so I have opened a dispute.

The seller has very good feedback but looking deep into it I found a negative for a none arriving Overlord to another buyer. Was that you? The seller's name is eazy-lderzweite