If the power supply unit was purchased from Digitec and the power plug does not fit...
Digitec is obliged to supply electrical appliances with a Swiss plug. If the unit comes 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.