I think that's exactly the reason as to why they didn't respond to you, which of course doesn't justify them to discard your query like they have done. I have been using Bitstamp for plenty of years now, and never have I enountered difficulties aside from them at some point required my to re-verify myself. It took me weeks to submit all documents they were asking for in ultra high res, due to them not accepting 'lower' res scans (while in reality these scans were high res). Sign up and sell whatever number of coins you want to unload - just make sure you submit all your documents in the highest possible resolution, because even when things according to our personal standards are high res, they will likely still not be accepting them. It will safe you plenty of time.