Cancelled upcoming installation but no confirmation

I had an upcoming installation in August and the start of a two-year agreement, which I decided to cancel. I arranged the cancellation of this installation and the agreement with an agent, who said that a confirmation email would be sent. This has not arrived. I see in My Account on web that there is no mention of the installation anymore but the agreement is still there, along with language like "Your first bill will likely be higher than you expect due to one-time charges and other factors." and under "Billing": "We're putting together your first bill." I shouldn't be charged anything at all, should I!! Do I need to contact them again??