1. The phone number was supposedly never entered into anything, so this doesn't follow.
2. What was the exact content of the text again? What was the intended scam? I am not going to scam you with a text that says "hey, did you mean to send money to XXXX for $YYYY". There has to be a payload, a link, something otherwise this is stupidest scammer on the planet.
With what was stated, and the content supplied in a text, it appears there is no logical path that can be drawn that this was some well-engineered new kind of scam. This means the facts aren't the facts, or info supplied is incomplete.
So far based on what I had read, this is supposedly the scam process here.
I am a scammer. I have hacked into an ebay seller's account (or whatever seller), and see that some customer Pagman has purchased something. I have his personal info, like name and address. But darn, no phone number.
Well shoot, let me do some research on the personal info supplied. Okay I have hit paypal hacked info. Drat, foiled again, no phone number there either. Let me hit the darkweb and see. Drat, this guy is smart, nothing there either.
Okay, let me hack all the pay as you go service providers to see. Ah ha, I found this O2 provider has a phone for him. Bingo! I have him now.
I am going to send him some texts, hmmm, what should I put in the contents to hack his accounts, his life, his family, his bank.... I know, I will tell him to be aware that he purchased something from this seller for $XXX dollars. That will give me everything I need to empty his accounts. That will show him, and I will have some spending money this weekend!
Really? Again we are missing something, facts or details not disclosed.
Is this scenario likely, or is it more that this phone number was indeed entered somewhere at some time in the past into the accounts used in this transaction, and since the account perhaps wasn't used very often, system texts went out warning about a purchase that was just made?
Maybe I am the only one that has missed some important detail and this has corrupted my assessment. Has happened before...