If the maintenance person was invited into your condo to repair interior on their own time - it's between you and the maintenance person, usually, has nothing to do with the condo.
If the management office sent someone upon your request, and your condo management is responsible in fixing interior of the units, according to your condo docs (which it's rather uncommon for the condo managemetn to be responsible for interior repairs), - then you need to speak to the condo management. If the condo management is not finishing what they started (and they are supposed to by condo docs), then you should call in reinforcement (a real estate attorney familiar with the condominiums - and not all real estate attorneys are familiar).
Hope this helps,
Beachfront Realty, Inc.