needhelpplease

Hi, long story short a webhost has renewed my hosting for 12 months even though my auto renewal was OFF and I did not authorise a renewal, despite the fact I had not even used the hosting for ~8 months, so clearly I was not interested in renewing.. but they are money grabbing and are ignoring my emails and just copy and paste their "cancellation policy" which is ridiculous. So seeing as they aren't cancelling my account, I want to make a PHP script to fully maximize the server resources. An infinite loop of whatever uses the most memory/cpu/network so they will CANCEL my account. Can anyone help? What is the best way to waste/maximize/slow down a web server? I would appreciate any help. Thanks!