¡Mis Ojos!

Could someone please explain the logic behind this to me, I thought I was a fairly intelligent person, but I'm obviously missing something here...

I wear contact lenses, have done for fucking 20-odd years, and it's such an ingrained habit now I haven't bothered getting a pair of glasses for almost that long. I've run out of lenses, because I wear daily disposables, and my fucking optician is using the snow, and this country's frankly hilarious response to it, as an excuse for a few days off*. So I need to go elsewhere to enable me to fucking see. Now if I bought them online (which I would have done had I had the foresight to know said optician would be closed for the duration), all I have to do is fill in my own prescription, pay and wait for a box of lenses to pop through the letterbox once a month. But I need some lenses immediately, so I went to another optician, who sell lenses online in the above manner as well as being on the high street and was duly informed that they cannot sell me any lenses, even though I have my empty cases with the prescription spelled out on the lid, because it isn't a written prescription from my optician. Same company, one rule online, another in the actual shop. Work that one out. I know it's not of earth-shattering importance, but this sort of petty crap really gets my fucking goat.

*Not that I blame 'em, we're all skiving a bit...