[Conquistador]

Taking this on a slight tangent...

We get endless unwanted sales calls at work, mostly due to a former director who gave the number out willy nilly. Previously, we just ask them not to call again and they reply with 'OK, we'll remove your details from our system', and that was that.

I don't know whether it's me noticing it more now with all the GDPR stuff, but now when you ask them not to call again, they almost all say 'OK, we'll update our records and make a note not to call again' instead of saying they will remove you from their systems but they will still hold all your information/data.

Seems you have to explicitly state that you want all your details held by them to be destroyed.