She rang me up after lunch time and told me she can find cheaper electricity provider. I told her I'm not interested but she didn't hang up. I didn't want to be rude. So spent way too much time talking into her to give up. Then the same person rang me again around dinner time when I was cooking. This time I didn't hesitate to hang up.
I've had three calls from this number in a day. They are clearly in a call centre from the background noise on the messages but I can't tell what they are trying to sell.