If it's at all difficult just reply saying something with the 'GDPR' keyword and they'll hop on it. A few times I've had unsubscribe links absent or not workin

If it's at all difficult just reply saying something with the 'GDPR' keyword and they'll hop on it. A few times I've had unsubscribe links absent or not working for whatever reason and done that and a human's replied and sorted it out.