I got a call from the company who is subcontracting work out to me.
"Is Mr bla calling you still? If he continues to call you I will go speak to him personally, and tell him to stop bothering you. He needs to understand that this is a favor we are doing for him. Next time he calls you, you let me know and I'll handle it."
However, it would make things awkward between the client and myself. Yikes..