Spam/**** Inbox for sale...

Im increasing getting more irritated with Afrihost! Every month I get an email to say my inbox is getting full and I need to upgrade my package to a more expensive one for more capacity. I literally only need my afrihost account for a couple of emails, nothing much yet I get spammed with emails re loan finance, ****s, tenders etc. Very few people have my email address, yet my email address seems to be in circulation. It almost seems like Afrihost is selling their database and in return we have to keep upgrading to have more space for nonsense emails. I am seriously contemplating cancelling all my afrihost accounts.