I would as Michael suggests send it via GA Services. I have used them for the last two years and would recommend them wholeheartedly. The shop is above La Piedra opposite the medical centre
https://www.granalacantservices.com/966 69 94 77
Address the package to: -
Your name here
C/O Gran Alacant Services
Av Escandanavia 72, Local 6, Blq4, Gran Alacant,
Santa Pola, Comunidad Valenciana 03130
Spain
Once the package is posted email Fran / Richard at info@granalacantservices.com and advise them that the package is on its way with details of who will collect it. They will mail you back when it arrives and you can make the necessary arrangements to have it collected.
There is a charge of €2 when it is collected.
Dave