Hi
This question is not about "how do I deal with a client from hell?"
it's more of a psychology question.
Right now, I am having this client from hell. He is a past client and he has accused me of all kinds of things that I am not guilty of, and threatened to report me to the Better business bureau, plus some other threats.
I was on the phone with this guy for an hour today and he is a lost cause. There is no reasoning with him. He won't listen.
It is very emotionally and mentally exhausting for me. After i got off the phone, I had to go outside for fresh air. I was seriously considering closing my business. All kinds of bad thoughts came to my mind, like "what if he comes to my virtual office and makes a mess and I lose my virtual office over this?" "what if he files a lawsuit?"
How do you "shake off" these thoughts and continue your business? do you just say "fuck him" and forget about him, or what do you do? I am so mentally exhausted because of this guy, I fee like I cant continue.
If I am in your "shoes", I would go over the matter with my lawyer and stick to what he decides. If you're a seller, don't you have any "Terms and Conditions" on your bills? Something like, Goods once sold will not be taken back... warranty: conditions apply... something like this? If you have then you can stick to those ToS clauses and stay quiet. Keep those mails of threats handy. It will make your case strong.
If you feel like refunding, do so, but do inspect the product first for any damages. If you have any restocking charges, apply it. Then forget everything about this sale.
This goes into your learned-a-new-lesson expenditure account! Be happy about it. I too feel that you hurried the closing of sale. You should have asked more questions about what kind of 'product' the customer wanted... anyway, stick to your lawyer's words and next time be more careful. Don't turn your good business into someone else's wh0re. Don't allow it to be abused by others... if you are careful you will have 'intuitions' about those potential customers and their 'hidden' motives... most of the times that happens to the 'lucky' and successful merchants. They have intuitions and that comes with practice and time... So they are "lucky" and successful!
In your case, the potential customer asked for pair of shoes and you simply gave him something off the shelve. Bad business practice!

Don't repeat it in future.
Create that double-entry accounting system and create an
invisible (to others) "learned-a-new-lesson-today" account in it and balance this failed trade... It will help your nerves.
P.S.:
The "shoe" didn't fit the lady? hmm... your lawyer doesn't have a place here!

Tell the customer that you're willing to replace if he tells you the exact size, color, make, type...

.
Kill the anger, but remember who made the mistake in the first place and take the chill-pill!
You can always sell these shoes to someone else who deserves the heavy discount on it! Great shoes those... they taught you an important lesson, and also made (will make) someone very happy on the rebound!