****ed

I have cancelled my contact 2 months back even sent the cancellation letter as per the document sent for me to sign but to my surprise am still getting calls for upgrade and also a statement that says the account is active. What ****es me off is that I called requesting a paid up letter that confirms that the account is closed I was told that u don’t confirm anything but I will see from the next invoice that shows a zero balance it’s July now the invoice still doesn’t say zero. Please close this access I do not want it anymore, why must it be a hustle. ****ed**