We sell Widget through a web site for £X,000 (it's a very good widget). Widget is all we sell. Demand for Widget spikes once a year when we release a new version of Widget and trickles down to a Widget purchase once every couple of weeks after a while. Here's the thing: we get a failure rate of c.40-50% on attempted purchases of Widget because credit card companies say WIDGET IS FRAUD (Widget is not fraud).
Is this related to our payment processor? The pattern of purchases? The cost? Would we do better moving to a different payment merchant? If so, who is the best?
Further info: Widget is physically located in the UK, as is the web site. Potential Widget purchasers are scattered all over the world but mostly in UK and Europe. We sell Widget online but need to take payments over the phone when online doesn't work.