Cancellation Not Done

After subscribing to Vox's disappointing and inferior service I cancelled the account within days of opening teh account as their technicians could not resolve a speed problem. <br> <br> I received an invoice and on conquering about the invoice after I cancelled the account I was rudely informed that my account was not cancelled and that it is subject to a 30 day cancellation policy. <br> <br> Why should I be giving 30 days notice if they cannot provide the service?<br> <br> Useless, unhelpful to top of their bad internet service!!!