Ghost messages on home phone

[Rcs123]

Just had full fibre connected less than a week ago and the house phone connected to the router. I keep getting messages on the house phone but there are no messages and the number calling is simply 01. The phone indicateds a message by a red flashing  light and is doing my head in. This is happening thru the night and sometimes gives a single beep.  What is causing it? How do I stop it?

[Michelle-TalkTalk]

Morning,

Do you still need assistance with this?

Thanks

Michelle

[Michelle-TalkTalk]

Good afternoon,

I'm sorry to hear this. Can I just confirm, are you using the Wifi Hub 2? Is it showing that there are missed calls every 30 minutes?

Thanks

Michelle