Onecart - incompetence service and No fulfillment of orders

I placed and order had goods delivered that were damaged, took two days for refund to go to my cart, then I used my credit to place another order which had items detailed as balers, and the shopper calls me to insist that she can't process my order due to the mistake. She is the shopper, I purchased from the app, but no one from the head office call me etc, and my items were just marked not found, due to them not wanting to honor my purchase. They are the worst online department to deal with, The shopper who is their staff, did not contact her superiors to resolve my issue instead sis exactly the opposite costing me a wasted second delivery fee. Now is that fair. And even though I have tried to contact them, there has been no feedback. Appauling and pathetic service. worse purchasing app to use.