When you say "reset" does that include a pinhole reset?
Subject to that the support team will gladly look into this for you, but they won't be back online until Monday. If you want quicker support then contact customer services directly, either by calling 0345 172 0046, or via Live chat.
I'm sorry to hear this.
Have you factory reset the router using the pin hole reset for ten second?
If you have tested this then I can send a replacement router.