Builders Warehouse - Daily Harassment - ENOUGH!!!

I get constantly bombarded with emails from Builders Warehouse, 3-4 mails a day!!!!!! I have repeatedly tried to unsubscribe and this does not work!!! I have repeatedly emailed them, this does not work. I called them, and got a call centre agent that simply referred me back to the email!!!????????!!! I have had enough. this is bordering on harassment. Next step, I will report them.