I’m sure that for a few days there will be other copies of your template. There’s no good protection for HTML templates. WordPress themes are little safer, because even if any has illegal copies, those copies can be of an old version without e.g. compatibility with WordPress 3.5.
Fighting with piracy copies of our themes doesn’t make sense.
Sure thing, not receiving any notice in this case is just weird.
It’s really strange, perhaps buyer got refund of an Extended License and that’s why your withdrawal was rejected, but it’s unprofessional.
No offence, but I don’t think that he has a lot of requests per day.