I advertised 4 tickets for AC/DC Concert at Hampden Park in Glasgow through the Online Ticket Exchange. I received an EMail from them to say that my tickets had been sold for £80 each and to despatch them by Recorded Delivery direct to the purchaser, which I did and also checked through Royal Mail that the tickets were delivered. I was advised that I would receive payment directly after the event had taken place (30th June). I am still waiting for payment, I have EMailed the company numerous times and have tried to call them but it keeps ringing out. I could do with some help on retrieving my money.