In the meantime you try calling the CIC call center, you can fax and mail the new address to the office (you can do both to ensure that they receive it). After sometime, you might confirm that they received your notification by checking your mailing address in their application tracking e-service. If you decision is coming soon, you might also want to notify the local post office about the change in the address by filing the moving form (they might charge you a nominal fee) so that any mail coming to your previous address with your name on it, will be forwarded to your current address.