Billed for account I was told had been removed

I requested an additional ad-hoc 10gb capped account, which was added, only to realise immediately afterwards, due to the confusing checkout system, I added the same account twice. <br> I requested the account which I was about to use, to be removed at the end of the month as one does with an 'ad-hoc' type of account. <br> <br> I left the other, unwanted one, untouched because I did not want it to look like there was any activity on the account, which there wasn't because I spoke with the billing department directly after my transaction on the phone and she then promised she will remove it