CUSTOMER SERVICE CONTACT US All questions, concerns, complaints, or suggestions about the online store may be addressed to the Customer Service department by any of the following means: - Email: firstname.lastname@example.org - By post: Tendam Retail, S.A. Av. Llano Castellano 51, 28034 Madrid. Claims Forms are also available for customers and consumers here. The Customer Service department will provide you with a reference number and a written acknowledgement of receipt upon the submission of your claim. Tendam will address your concerns as swiftly as possible, and in all cases, within a period of one month.