I have checked an account in your name supplied by Waverley College linked to a hotmail email address. The account does not have any devices linked to it.
For the filtering to work you need to install Mobile Zone on the devices you want filtered.
If you have installed Mobile Zone on the devices but they are linked to a different account please contact us with the relevant details and I can look into this further.
Our contact number is 1300 398 326. You may also contact us if you need assistance installing and activating Mobile Zone on your son's devices