Facture non justifiee

Hello I sent you my aviation headset for reparation. It was still under warranty. Unfortunately you rejected the warranty which I accepted. To repair my headset ( change the cable only) you asked me almost half the price of the headset . I refused to pay and asked to have my headset back . And now now you asked me 130 euro to send it to me ( coming from Germany). You never told me that I ll have these expenses if the warranty was rejected.