Could you ask a friend/neighbour to hold these items in their freeezers for you in the interim? Ideally you should have planned a head and used up as much of what was in there by this stage, but too late for that now.
They can't be expected to take away a thawing freezer that will leak.
I believe if they are a member of RePak then they are not obliged to take away all packaging.
The manual that some with the new one will specify how long to leave it before putting any food in it, usually in the region of 24 hours.
Leo