You can update your electronic contact details (email and mobile phone number) and control the use of your personal data by submitting permissions and prohibitions on Oma S-kanava, by visiting a co-op member service outlet (available in nearly in all Prisma and Sokos stores), by sending a message via the feedback form – select “asiakasomistajuus” (co-op membership), S-Etukortti card and Bonus as the subject matter – or by calling the S Group’s co-op member service, tel. 010 76 5858 (Mon–Fri from 9 am to 4 pm, call rates € 0,084 per minute) or by sending an email directly to the controller at tietosuoja.asiakkuus@sok.fi.