Caller: Someone claiming they will be disconecting my phone service as nbn is now available in my area

I tried to call back but it has incoming call restrictions, i think there is something wrong with this as a yj wanted me to press 1 to continue without giving more detail, and since i have been on nbn for 5 years now with the house my mobile number is connected to, the lack of ability tobtalk to anyone makes me very wary considering i have come across over 20 confirmed phone scam in the last 6 months w ready