225cm x 105cm x 83cm does not strike me as that big and are you sure you need to dismantle it? I think it will fit in most HK elevators (Standing upright is just like a really tall person) and fit through most doors. You know how to lift a sofa right? Just you grab one end, someone else grab the other end, you carry it down to the street and chuck it in the back of a gogovan 5.5 ton truck. Cost from Nam Cheong to North point is about $290.
If you really want to go to all the hassle of a dismantling it, then it will fit in a Gogovan Van and dont need the 5.5 ton truck. This will cost $130 instead of $290, so saving you $160. But then you need to go throught the hassle of dismantling it, which actually is not a big hassle and most Ikea furniture comes with the little wrench tool needed to assemble/disassemble if you kept that. But it seems like you dont want to get your hands dirty or didnt keep the little tool and want someone to do for you. So then just pay a bit more for the 5.5 ton truck and be done with it.