I have been struggling with their reseller account, which has turned many of my clients aways due to their inefficiency of solving issues and experiencing a lot of downtime on websites

I have been struggling with their reseller account, which has turned many of my clients aways due to their inefficiency of solving issues and experiencing a lot of downtime on websites. I decided to move the remaining sites that were under the reseller back to Afrihost shared hosting to pay monthly as opposed to reseller and requested them to cancel the reseller. I am now being told that I need to pay a full amount of the reseller which has no content for the month of July. This is totally unacceptable for me because when you sign up with Afrihost or any service provider, you are charged Pro-rata. Why pay Pro-rata for buying but no Pro-rata is charged for cancelation??? I have proof of all emails since signing up with reseller I have only experienced issues and that was not what I expected at all. I am a dissatisfied customer at this moment and I refuse to have to pay for separate domains as well as pay for a reseller that is not in use.