Advice for moving stuff

Hello! I hope this is the right section,
I need advice regarding moving. I currently have my belongings in a self storage unit , I paid for the smallest room available because o didn’t have much, two suitcase, some plastic boxes, some baskets filled with you know some kitchen appliances, books, clothes, some kitchen items, organizera etc. But again not much ( I have various photos and videos ) I need to send them to Spain , to my mother .
Precisely Alicante. The location is currently Bristol. Do you have any moving cheap companies, or parcels services or something else? Many thanks!