Seriously outrageous.
I rest my case. This is absolutely unacceptable (and, I am led to believe, illegal under the distance selling regulations and sale of goods acts) and I really don't think you should even begin to accept a £6.50 loss for their mistake/incompetence/deliberacy. This is clearly their "policy", and as I said in my earlier post, they are clearly doing this so as not to lose money themselves but let customers take the hit. If every mistake was actually paid for by them, then they might actually sharpen their act up, but, no, they don't give a sh-one-t, and until we customers act, it'll go on.
i would politely suggest the following actions:
You get back in touch with them and demand your £6.50, referencing distance selling regulations.
As Craigy is happy, contact Chris P to see if he is too, and then refer Ingrams to this site/thread.
We on the forum boycott them and further spread the news of their appalling service among the coin fraternity.
Do members agree, or am I being the unreasonable one??!
Originally I wasn't going to pursue this, but on further reflection I think I will. If I hadn't mentioned the cost in my e mail to them, then I wouldn't. But having done so, I find the fact that it's been totally ignored as of zero importance, deeply irritating. It's definitely not the way I would treat others.
So yes, a further e mail on that topic will be coming their way soon. I'm no barrack room lawyer, so I won't be mentioning the legislation you refer to, but they'll get the message - trust me on that.
Oh, and no, you're not being unreasonable.