Yes - that must be awkward. What gets to authors is the organised fashion of it all these days. Since ebay came along it's become a highly organised industry, and most of the people doing it don't know who you are or care - they just want some free money.
The other thing that's happened is that lots of people have started their own book review blogs. Most are obviously genuine but some are mainly there to get free books - and then doubtless sell them on. I suspect publicists are  getting very sick of the whole thing.