Is this a bit weird? Giffgaff sims through my door

[Bazinga2022]

So I have received 5 seperate envelopes from giff gaff this morning, all containing a sim. Not addressed to me, but I did open one to try to figure out if it was just marketing rubbish.
Did a bit of facebook digging and the person they are addressed to appears to be one of my neighbours, ordinarily I would just take them round to her, but it's the message within the address that I'm intrigued by.
I have attached the photo so you can see what I mean, it's her name and my address that I have blanked out on each one, but the bit in-between, is it someone trying to send her a message but got the wrong address? Or is the message meant for me? Or is this some sort of weird giff gaff marketing? Has anyone ever seen anything like this before and should I take it to the neighbour?

I would think it's someone trying to get in touch with the woman next door but inadvertently got the house number wrong and they came to you.

I would give them to the woman next door and point out the cryptic messages and say that any more Mail in her name that comes to you will be binned as you don't want to get mixed up in anyone else's sordid lives.

It's not legal to bin someone else's post. You know they were addressed to your neighbour, just an error with the incorrect house number. You should have just put them through the letterbox.

It's usually best to put wrongly addressed post, which this was, back in the post with not known at this address on then Royal Mail deal with it, probably sends it back to GiffGaff as that is clearly where it comes from