Honestly, I think I would cut the guy some slack. How was he to know or prepare for such an accomplished artist of singing into the pink karaoke mic? I guess the correct thing for the provider to have done, would be to let you know he was getting close and let you decide if he should cum at that point. But, that didn't happen so it becomes all about the provider's performance in recovery, i.e. finding another way to please you. He at least made some effort to acknowledge a less than desirable outcome.
Most of us have probably experienced our share of truly pitiful blowjobs. Given Jeff's experience, I think the real questions to be answered are, Jeff
-what is your rate?
-do you have an ad?
-are you planning to travel?