Alright, let me rephrase: I am interested in such companies that somehow have my details on record despite me never contacting them, and who show no understandi

Alright, let me rephrase: I am interested in such companies that somehow have my details on record despite me never contacting them, and who show no understanding of the principles of GDPR; in particular I want to know what they hold about me and what the source of their data is, which is why I send the letter (which I have modified to remove the stuff I am not concerned about). Some of them have since replied with "we've gone ahead and deleted all your data", which could be interpreted in many ways I guess