What did you ask them to get this response? E.g. did you request to delete your data, then followed up over email to confirm it was deleted? Also, are you based in California?
"Your Genetic Information, date of birth, and sex will be retained by 23andMe and our third party genotyping laboratory as required for compliance with applicable legal obligations, including the U.S. Federal Clinical Laboratory Improvement Amendments of 1988 (CLIA), California Business and Professional Code Section 1265, and College of American Pathologists accreditation requirements.
It is important to understand that the information stored is distinct from the raw genotype data available within your account. The raw data we receive from the lab has not been processed by our interpretation software to produce your individual-level genotype data (in your account).
You can read more about our retention requirements in the retention of personal information section of our Privacy Statement."