Biweekly Grocery Shopping in Buenos Aires

I am looking for someone who can assist in doing grocery shopping biweekly in Buenos Aires for a family member. The preferred bidder would ideally: - Reside in Buenos Aires or have a good knowledge of grocery stores in the city - Be able to shop "a little of everything" - from fruits and vegetables to meat, poultry, and dairy products The right person for this job should have superb organizational skills to plan the shopping, ensure all items are purchased, and coordinate with me for payment and necessary adjustments. A high level of trustworthiness is paramount given the nature of this assignment. Knowledge of the best places to get high-quality products at reasonable prices in Buenos Aires will be a significant advantage.