Cancellations Department haven't sent me docs

I cancelled my 2 x TopTV (Starsat) decoders and account, not because of bad service but rather because of poor programing. I called in almost a week ago and gave all my details and was told by the lady that she would cancel my 2 decoder accounts on my name/ID number. I specifically asked for a cancellations letter, confirming that I don't owe you any monies (I was on your prepaid offering) and that both accounts of mine are now permanently cancelled. It's almost a week an no response. Please can you call me on my cell or EMAIL ME on: [Email Removed]