Legislation stipulates that every shop that 'brings an electro-appliance onto the Belgian market' must also take care of the collection and processing of the discarded appliances.
So, simply return your discarded appliance to the shop where you are buying a similar new appliance. In this case, the shopkeeper is 'obliged to accept the discarded appliances that customers bring back'.
For example, would you like to hand in an old freezer when you buy a new one? No problem. The brand or the place of purchase does not matter. Even when delivering a new appliance to your home, the shopkeeper is obliged to take your old appliance away, free of charge, when you request this.