Precursor to slamming??

A bit of background first.

We have a BT phone line for speech and VDSL from Andrews & Arnold for broadband. Additionally we have a CallSign number on our phone line, originally for fax via a CallSign switch, now simply pick up if that different number used.

Yesterday, had a call on our CallSign number from Origin Broadband Sales. Told me that via social media they had received a message saying that I was interested in a broadband service from them. I said that I wasn't and asked what number they had been given (just in case he had misdialed it) he gave me our C/S number. So looks like the guy who had used social media had made that mistake.

Having read bounderboy's thread https://forums.thinkbroadband.com/unhappiness/f/4636... just the day before, certainly had me thinking.
One thing which I do not think they could have done is to have put my CallSign number into a checker. It is in effect a virtual number, since it is paired with our existing number and just gives a different cadence ring. A bit like trying to obtain broadband on a VoIP number.

At least with Andrews & Arnold, I don't think that anyone will be able to slam me.

Cheers!

Why not ask Origin who posted them a message on Social media. Origin could ask them for their name and address and maybe they would like to have Origin BB.

I could give it a try, but I bet I get the usual GDPR response

Cheers!