Contact

Support and billing: write to the address above from the email on your account.
Refunds: within 7 days of your first payment; see the refund terms.
Privacy requests (access, correction, deletion): see the privacy policy. You can delete your account yourself on the account page.
Remove or correct a job listing: use the removal form.
Security issues: same address; see security.txt.

The operator's name, address and the details required under the Act on Specified Commercial Transactions are on the commercial disclosure page.