Hi @victoria3004 welcome to the forum and thanks for posting. Sorry that you are having a problem with the Wifi extender. If you still need help with this give the product helpdesk a call on 0808 100 6116 (Mon to Fri 9am to 5.30pm, Sat 9am to 2pm or drop them an email: btconnectedhome@bt.com
If your product is out of warranty, please call the Help and Support Desk on 0800 980 899.
cheers
John