Firstly, please check your receipt to confirm that it says "This product is fulfilled by Topspin Fulfillment". If not, you will need to follow the fulfillment link provided on your receipt to enquire if it's possible to change your address.

If your product is fulfilled by Topspin Fulfillment and your order has not shipped yet, please submit a support ticket at the link below as soon as possible requesting to change your shipping address. Make sure to provide your new shipping address in your support ticket. You can check whether your order has shipped yet on your receipt.

Here is the link to submit a support ticket: https://app.topspin.net/account/help_public 

We are unable to change address information once an order has processed and shipped. If your package is not deliverable as addressed, it will be returned to our fulfillment center and automatically cancelled and refunded.