I totally just got "no soup for you"'d

Considering last year's tax debacle in which the government took most of my money all year long and even then I owed additional moolah at tax time, I decided to get an accountant this year to help me navigate the shady back alleys of tax returns. A girl I know recommended this accountant but noted "he's quite short over email, but in person he's very nice". So I email the guy telling him how I got his name and asking for an appointment. Indeed, I get a three line email in reply - which I have to say, I appreciated: no need for us to talk about our childhoods, etc. He asks my job, any stock sales, etc. I duly supply this information in a short, sweet email.

Then I made my fatal mistake. I sometimes wish life came with instructions for how to avoid total blindsiding.

I mentioned that I have celiac disease, which requires an expensive, preserative-free diet (meaning I shop at Whole Foods WAY too often) and I'd heard there's a tax break for medical conditions such as these, and I'm just wondering if he knows anything about it.

Return email, totally normal: he asks how much I spend and is it over a certain percentage, do I have a letter from my doctor, etc?

My return, and here's where I begin to fall into the trap: yes, I have information from my doctor confirming that I have to eat organic and gluten-free food and I spend about X per day on said food.

(as we slowly go off the rails)...his return email: well, I don't think you qualify because I eat organic food and I don't get a tax break. Lots of people eat organic, etc.

So, two things are happening here. One is that I do not recognize that we are now evidently having an "argument" about whether or not I can swing this tax break. I'm mistakenly thinking he just doesn't understand the allergy - which is fine, most people don't, and that (second mistake) I have to explain it further. My return:

It's actually gluten-free food that I have to eat and food without preservatives, etc etc. (Keep in mind here I think I'm just being helpful, telling this guy I wasn't being clear and here, let me help you understand...)

His reply?

"I am cancelling our appointment. I do not think you qualify for this tax break. You do. I do not have time to argue."

And the final word?

"No appointment."

I guess I could wax poetic on email as an uncertain medium because of the inability to convey emotion over written words, but it really just comes down to, this sort of thing always happens to me and what's more, I still have no idea how I thought we were coming to a point of understanding and he thought we were throwing down. Needless to say, I guess I have to find a new accountant...