HA! After numerous calls to all the dealers who sell the product, I received a telephone number from the manufacturer.
According to the staff, the current lack of online presence is due to the start-up of the company and should gradually improve.
Here is the phone number (I hope it is ok to post it): 062 511 11 55

Try https://www.shopcom.ch - this is given as the service centre for another product in the instructions. -> https://www.touringshop.ch/media...

Thanks for your answer, Brimstone.
I called Shopcom this afternoon and got the answer: "We no longer work with VMAX.
So unfortunately I'm still looking.