Customers have Costa sunglasses repaired by mailing them in to Costa. The sunglasses are then repaired by the same store that originally made them, if they wish.
To have a pair of Costa sunglasses repaired, simply sign up to create an account with Costa, if this has not already been done. Costa then requires that customers fill out and submit a repair form, followed by the customer mailing in the sunglasses. Costa will contact the customer, informing them of their repair options. This typically involves Costa giving the customer an estimate to repair the sunglasses, and the customer stating whether they would like to do this or not.