No one acknowledges

I paid my settlement amount on Saturday, I emailed them a copy of my ID, the receipt as well as a letter to indicate that i want this account closed on Monday morning.. I emailed it again and yet no response, after i asked to please respond and confirm it. Can someone ANYONE please confirm if it was received and my account closed??? I see a lot of people complaining about the same problem and if i get a bill to pay I am going to be furious as hell due to other people being *********** and I will refuse to pay and take the matter further!