In case of returns you are responsible to organize and pay for the return shipping (unless the parts are covered by our fitting guarantee). Generally, you are able to use any shipping service of your choice, we do however recommend to select an insured service with tracking to prevent the parcel from being lost.
Alternatively, our customer service team can assist you and issue you a prepaid return shipping label from DPD or DHL (depending on the region). The cost of return shipping will in such cases be deducted from the refund amount.