I am a business owner, and answer incoming call to...

I am a business owner, and answer incoming call to the business I own. The huge irritation I have, is that every single day I get phone calls from this company, sometimes two, sometimes around ten. They are looking for random people each time, never the same name. Every time I explain I am the only person at this number and ask for it to be removed from their system. I have spoken to supervisor after supervisor. I have been promised the number would be deleted to no avail! The last I spoke to a Percy that gave me his email address, and said I should email him directly to make the harassing calls stop. Since I have had a call while he was on duty, but not in office. I asked him to return my call. That never happened. So I have tried to email him, and guess what, email bounces back. The pain that I am experiencing from this is to hard to explain. I just want the bloody phone calls to stop. Is there anyone out there that can hear my plea???