From Bulgaria to the address of the Russian company Agr

From Bulgaria, the Russian company Agroimport received goods - 40 tons of grapes. Delivery of goods was carried out to the port of Sochi at the seller’s expense, and from it to the customs office of destination by the buyer’s vehicles. During transportation, the grapes deteriorated, as the goods were transported in a container not suitable for this.
What customs regime should be applied and what conditions should be observed when placing goods under the regime?