Cancellation of Service

I canceled my service with Home-Connect on the 1st of July giving the calendar month as stipulated in their terms and conditions. I was told by the call center agent today that my service will be canceled as of the 1st of September. I am confused I canceled the service on the 1st day of the month giving the month notice, how can the service only be canceled a month later. When asking the call center agent the question all I got was "This is how our systems works". This seems to be a flaw in the Home-Connect systems.

Home-Connect please explain?

I have canceled cell phone contracts, clothing accounts, banking accounts all on the 1st of the month as per their stipulation of a calendar month. How can canceling on the 1st of the month with Home-Connect take two months to action?