Oh No, They Are Flooding In Again!

Is anyone else inundated with unwanted catalogues that arrive through the post? About two years ago I had a blitz to try and stem the flow. First of all I removed my name and address on each catalogue and stuck on labels "Return to Sender". Our local sorting office seemed to have a vendetta - they tore off the labels and sent the catalogues back to me! I then tried emailing the companies concerned asking them to remove my name and address, however this seemed to have a double whammy effect - I received not only one catalogue but two! Nobody had bothered to read my email, obviously the easiest thing to do was to add my name and address again! I am certainly not going to spend money on telephoning and the arrival of these catalogues seem to keep the Post Office in business.