you will need a plumber for tiling painter for the mould etc and electrician for the fan
A good builder can arrange all those trades
Most of good handymen can sort all out. For egz if that. Was near me i would suplay one man to sort all. If you looking for right stuff to paint over mould message me and i can give you name of product.
you could use a building company who will have all trades & take responsibility for the whole job
an Electrition for Fan removal
a tiler for tiling
a painter to resolve the mould issues
treating mould is so very important as it can be responsible for making us ill.
it is usually down to poor ventilation & incorrectly applied paint system.
Zinsser Perma-white mould resistant paint
(tintable in store) is the only product i use
after treating the mould & suitable preparation