Acne control cleanser import inquiry UAE

I am interested in your product range, especially the Cerave Acne Control Cleanser (237 ml), and I am considering a bulk purchase. To proceed further, I would like to discuss several important details:
Minimum Order Quantity: What is the minimum order quantity for the Cerave Acne Control Cleanser? Is there any flexibility for first-time orders?I am looking between 350 - 400
Brand Authorization Letter: Can your company provide a brand authorization letter specifically addressed to me or my business, No Fuss Finds, to assure product authenticity and legal resale rights?
Competitive Shipping Terms: I understand some suppliers offer free shipping. Do you offer similar terms? If not, please provide details of your shipping model and associated fees.
Delivery Timeline: How long will it take for the products to be delivered to Dubai once an order is placed?
Best Price Quotation: Considering a potential long-term partnership and a substantial initial order, what is the best price you can offer? Please provide pricing tiers based on different order volumes.
Customs and Clearance: Who is responsible for customs clearance? Is this managed by your company, or will it be my responsibility?
Trust and Product Authenticity: Establishing a trustworthy partnership is crucial for me. Can you provide references or testimonials from previous clients? What guarantees do you offer regarding product authenticity?