As you have been stonewalled by Mammut customer service and Swiss legal helpline, I would advise you to try your luck directly at the top, you have nothing to lose by personally contacting the head person of B2C. I found this info which you may chose to use. Good luck.
Mammut Sports Group AG is a Swiss producer of mountaineering and trekking equipment with headquarters in Seon, Switzerland. Mammut belongs to Conzzeta AG.
Conzzeta AG is a Swiss holding company. It stands for innovation, reliability and a long-term perspective.
Change of management at Mammut Sports Group
Seon, 23 January 2017 – Mammut Sports Group announces the appointments of Adrian Margelist as new Chief Creative Officer and Matthias Hanny as head of B2C . Both will become members of the executive management of the Mammut Sports Group.
Adrian Margelist (Swiss citizen) will assume office on 1 April 2017...
Matthias Hanny (German citizen) will assume office on 1 March 2017. Amongst other responsibilities, he managed the implementation of the company's growth strategy with a focus on DACH countries, the US and the UK.
Conzzeta Management AG
Giesshuebelstrasse 45
CH-8045 Zurich, Switzerland
phone +41 44 468 24 44
info(at)conzzeta.com