Goods still not received after 4 months, money not refunded

Approx €80 worth of teabags have still not been received more than 4 months after I ordered them. Refund (of "Vorkasse" payment) has still not been received 7 weeks after I requested it. Communication from the company stopped after I requested the refund. Impossible to get through to them on the phone, so it has to be via E-Mail - which they are not responding to. The attached screen shot (of the order status shown on their website) is from 7th June 2016.