fix: add workaround for custom prices handling

internal/utils/transfer/tariff.go

@@ -13,6 +13,12 @@ func TariffsToProductInformations(tarrifs []models.Tariff) []*discount.ProductIn
 		for _, privilege := range tariff.Privileges {
 			productInformations = append(productInformations, PrivilegeToProductInformation(privilege))
 		}
+
+    if tariff.Price != 0 {
+      for i := range productInformations {
+        productInformations[i].Price = tariff.Price
+      }
+    }
 	}
 
 	return productInformations