Cancellation problems

I have recently moved home and had to cancel my internet. This opportunity to move came available on the 14th of the month and by the 16th we had signed the new lease to move in at the beginning of the next month. I straight away contacted Vox to inform them that I would need to cancel as I am on a month to month contract and it says that you can cancel anytime. The lady proceeded to inform me that I will need to pay for the full next month as I have not given a calendars month notice, something that was impossible to do. My question is, how can you tell me that I can cancel anytime, but then need to give a calendar month notice. I cannot actually cancel at anytime, I need to cancel on the 1st of the month! I said I have no problem paying till the 16th of the next month and then I just get credited the difference. They proceeded to tell me that is not how it will work and I will be debited the full amount. Paying in advance, I do not see why this is a problem to credit me as I have not used the service, yet. It takes 10 minutes to activate your account, but you need to give 30 days notice to cancel the account? How is this possible? You are more than willing to take my money, but fight every single thing rather than try to help your customers. I now am paying for my new internet connection at my new house and paying for internet at my old house which I am not using. This is poor from Vox, you should be able to change and adapt just as your customers are doing. There are circumstances that are out of ones control, and you should be open to suggestions on how you can keep your customers happy. From the beginning of this month I started my new contract with Web Africa. Thanks for nothing, Vox Telecom.