Rehang existing cupboard

I have a cupboard in my kitchen which is situated above my kitchen counter, about 100cm or so. The cupboard is visible from both sides (inside the kitchen and from the living room). The cupboard is only anchored on the sides. The wooden support beneath the cupboard has bent over time, resulting in a gap forming between the roof and the top of the cupboard. I need someone to take it down and put a new and improved support in place please. I also have a small job in the cupboard in the room, just inserting a new lock. Furthermore, if you can paint the unit that will be great otherwise I'll get another tradesman. Thanks