How effectively does your company repair older refrigerator models (e.g., those manufactured 15-20 years ago) or, conversely, rare or premium brands (e.g., Sub-Zero, Smeg) that require specific and hard-to-find parts? Does your company maintain its own spare parts inventory, or do you rely on third-party suppliers? What is the maximum waiting time (in days) for delivery of specific or original parts that are not currently in stock? Do you offer an alternative solution (e.g., installation of a generic replacement part or partial repair) if the original part for the older model is no longer in production and cannot be found on the market?