Phone billing repeated number being called??

[#1]

I received an email warning that I had nearly reached my credit limit for home phone calls, I looked at my itemised home phone bill and it lists the same number over and over since Dec 1st every 8-10 minutes it says I have dialled (I haven't!) tried phoning for help (45 minute wait time at the moment and online chat is offline!! What happened to award winning customer service?)  If I go over the credit limit I get charged an 'admin' fee - I am not dialling this number! (Have disconnected phone) would welcome any suggestions please!

Jo

[#2]

Thanks for getting in touch Jo, and I'm sorry to hear you're seeing numbers on your bill you don't recognise.

In these situations, we'd usually find a fault which may indicate a crossed line, but testing your line isn't finding any issues. Do you have any equipment plugged into your telephone socket other than the router? For example, an alarm system?