Deleting My Account

I haven't ... well honestly I've never used Loadsmart. I went through an orientation and was talked into signing up for an account before I was really even doing business with any carriers. So, for 7 months I paid my monthly subscription until it dawned on me I'm just giving money away. I've sent multiple emails to the company asking them to stop sending me invoices for services NOT rendered to me.  They still just keep sending me invoices hoping for free money I guess. I just need to delete my account with them and cut ties.