Digitec is obliged to supply electrical appliances with a Swiss plug. If the appliance is supplied with a foreign plug, a suitable replacement cable should be supplied if the mains cable is pluggable or, alternatively, a suitable adapter if the mains cable is permanently connected.
If the appliance is delivered without a suitable plug, complain to the customer service and insist on a cable or an adapter, free of charge.
This is a common occurrence, but certainly not a problem that would justify taking the product "off the site immediately". Why should it? A coffee machine of this type is plugged in once, the adapter for it is a plastic piece between the socket and the plug, and after that the matter is forgotten!
First take a deep breath and chill!