We took ours apart and moved it in pickups. Then put it back together at our new house. It wasn't easy, lots of work but doable.
If you want to pay someone hundreds and hundreds of dollars to do something you could do yourself over time then try contacting the company it was purchased through or some other company that makes, sells, and constructs the same things.
I will say that the mulch is bacteria and mold in it. If you try to take it up you should wear gloves, masks, and have some Benadryl handy.
Leaves and cut grass blow into the mulch and decompose. They are organic and therefore grow nasty stuff.
Just be careful and I bet you can leave some of the structures intact, we left the fort together on ours. Just toppled it over onto a pickup bed and tied it down. It was bigger than the truck but since it's hollow, not a solid piece of wood, it was light enough to be transported by the truck.