power steering fluid leak after alternator replaced--not there prior to service

What is your question?

Had oil changed and alternator replaced in my van. Noticed oily leakage next day and took van back to shop thinking it was engine oil. They said engine filter and cap was fine so I left. Next day still noticed more leakage so went back to shop for 3rd time. This time they said it was power steering fluid leaking as they had to disconnect hose in order to replace alternator and power steering fluid leaked onto engine. They cleaned engine, checked hose and fluid and said it was fixed. 8 days later I'm still seeing some leakage. None of this leakage was there prior to the service. Is this shop guilty of puncturing a hose or something and they are giving me the run around trying to cover it up or are they telling the truth? and why would there still be leakage?