poaching by btinternet

[#1]

Although I am registered with the Telephone Preference Service I received a phone call from BT this week.
The essence was that they wanted me to switch my phone number and broadband back to BT. (I was never with BT for broadband).
I said I was in a contract with Plusnet (another BT subsidiary) but they said they would buy out my contract. I doubt it since I have just paid my annual line-rental up front!
My response was of course no on the grounds that I have been with PN for years and they are cheaper. I also expressed my concern that one BT subsidiary was trying to poach customers from another subsidiary.  Yeah yeah I know about the chinese walls.
Are others experiencing this?  Is Plusnet aware?
BT of course are buying out EE who also offer landline and broadband. Indeed EE also texted me this week with a very good offer but they have a less reliable service than even btinternet.

[#2]

Hi bewick,
Without mentioning this for the sake of splitting hairs over terminology we're actually a totally separate company to BT Internet rather than a subsidiary so it's likely they're using their own marketing data which is unlikely include which ISP you're currently with.
Thanks for mentioning this all the same and for sticking with Plusnet

[#3]

Such a call smacks of the wild west internet of five years ago when slamming was commonplace. I would be very suspicious of such an approach today, it sounds too like a scam.

[#4]

The quickest way to get rid of a BT salesperson is to ask if they offer a static IP address .......