Cosyfeet contacted me and were very helpful. I would still continue to try and get something suitable from them as their customer service is excellent.
First, I would like to acknowledge that Cosyfeet does have a very generous returns policy. I bought a pair of trainers two months ago and although they felt comfortable in the shop, when I wore them on the pavement outside a few days later it was clear that the sole was not as thick or strong as it appeared and I could feel every bit of the pavement as I walked. Nevertheless, Cosyfeet gave me a full refund and I bought a different pair which again looked as if they had thick, shock-absorbent soles like any other trainer. However, yet again, I have found that these trainers have very thin soles and are not like normal trainers at all. They are very thin and I can feel the pavement. On days when my feet are less swollen I can get my normal trainers on and I noticed how the soles are much thicker. It is very exasperating as they are not cheap. Getting a refund is not really the solution. I simply want a pair of trainers that have the type of support and impact absorption that normal trainers have but just made for wide feet. Why can't Cosyfeet do that?