What if you have a complaint? Don’t hesitate to contact our helpdesk on 1976 (free of charge for Vikings) or 078 353 033, or via email: info@mobilevikings.com. You can also turn to the Telecom Mediation Service via email: klachten@ombudsmantelecom.be, via letter to Bisschoffsheim 29 - 35 in 1000 Brussel, or by telephone on the number 02 223 09 09. Another option is the Online Dispute Resolution Platform.