Log into your account at myonecloud.com

Select Answering Rules from the top of the OneCloud WebClient.

Click the Allow/Block button located towards the upper right-hand side of the page.

Once the Allow/Block popup window opens, locate the Blocked Numbers section.

Click inside the Enter a Number text field and type the phone number you’d wish to delete.

Click the plus sign to add the number to your blocked list.

When finished just click Done.