I Cannot Reach the Letgo Seller After Buying a Used Item Safely

I purchased a second-hand item from a seller through the “My Wallet Is Safe” section of the Letgo app. My order number is 91272, and I paid ₺1195 for the product. I live in Antalya and made the purchase four days ago. However, after the transaction was completed, Letgo automatically closed the chat between the buyer and the seller, making it impossible for me to contact the seller. The item has not yet been shipped, and since I cannot reach the seller, I have no information about the status of the order. During this process, I also could not find any technical support or customer service contact options on Letgo. I am currently experiencing distress because I cannot reach the seller and fear I may not receive the item I paid for. I expect Letgo to update the app to allow better communication between buyers and sellers, including continued access to messages and contact details. I am also requesting support from Letgo to resolve this issue and help me reestablish contact with the seller.