Question: I am registered in a big online retail shop. May I ask them to delete my personal data but at the same time continue using their services?
Answer: That is hardly possible, as your personal data is necessary for the online retailer to be able to identify you and send you the items you have purchased. There are instances where you may wish not to share your personal data and continue to use the services of a company, but in this particular case a contract would not be concluded without your personal data.