Charged for nothing

For most refunds you'll need to go directly to the Xbox refund page or contact Xbox phone support.

You can check your subcription status on your account to see if it was processed. You don't actually recieve anything other than permissions. Plus it can take a couple days to process. In the mean time you should be able to find out for sure if you get
in contact with support.

Try https://support.xbox.com/en-US/contact-us and then click in Billing & Account

Is there a number to call xbox on to sort this out

You can request a call back or chat with support at http://support.xbox.com/contact-us