Compost (for herbs, berries & veg.) (Bellevue EH7)

Hello, I have just started to tend to a garden and am hoping to find some compost for a raised bed growing food (mainly - vegetables, berries and herbs).

The bed is 8 inches deep and about the size of a double mattress. It is semi-filled with twigs and branches and I think it will require about 15-20 small garden sacks to complete.

Here is a rather big 'ask'. I only have access to a bicycle for transport and if it's more than a rucksack full, I would need the majority of the compost delivered. I am most happy to load/unload everything myself and have loading bay parking in front of the stairwell door in N.E./Central Edinburgh.

Many thanks for any compost that you may be able to offer.