They say they are part of Thorn group and that they are ringing on behalf of a government agency about a debt I have. They are asking me for my personal details. If they are working for a government department, they should already have this info.

Spam, suggested blocking it

they call and hang up when answering suggest add to block caller

They hang up every time I answer. Probably waiting for me to say my name first before continueing.

Caller: NCML

Parasitic debt collectors