Not sure they sent these to try and comply
A very good friend worked until fairly recently at one of the mobile telcos that now constitutes the EE brand, and I assure you they had teams of folk ringing customers up who'd requested no marketing contact to 'ensure their preferences were still reflecting their wishes'.
It was overtly used as a hook to engage in chat and try and up sell and upgrade. Much debate occurred internally about the legality of this and many refused to engage in it, my pal being one.
So I could easily imagine the justification of these emails being agreed in marketeers round tables and not those in charge of data compliance.