Online item not delivered and refund not given

I placed an order on tfg website on the 6th July 2020 for three items. Two of the items were delivered to me but I am still waiting for the third item (its currently over a month since placing the order). I logged a query with their customer service department multiple and all I'm told is that they are following up with their online department and the warehouse. I have requested a refund for the item and still no feedback. Really bad customer service