I understand that they are suffering due to their problem which outside their control.
But the problem is that they seem to get angry fast.
I deal with them as customers(I work in retail) and while I respect them and give them the lowest prices immediately (because I know they can’t haggle as normal people) I try to avoid dealing with them as possible (when there is other employees who can handle them).
Is there is a solution to deal with them with no suffering from my side or is it just a permanent part of handling them?
(Note: I am asking for people with experience, not people who talk in ethics theories and philosophy)
If writing is an option, then keeping pen and paper handy can facilitate communication.
An abundance of patience is useful. You can never really be sure what’s going on in someone else’s head, and that’s doubly true for someone who can’t tell you if they wanted to. People tend to mirror other people’s energies though, so if you remain calm and relaxed that can keep things smooth.
Something to consider: if you can’t speak, then body language becomes your primary method of communication. I wouldn’t be surprised if expressions and emotions become exaggerated because it helps get your point across. Mild annoyance could be perceived as anger if you’re sensitive to it.
Something else to consider: being able to lower the price is one of the easiest tools for pleasing a customer, but if you start at the lowest possible price then you’ve got nowhere to go lower if your customer already had reason to be irate. Plus if haggling is expected then your customer might not really know that you’ve started at the lowest price and might think that you’re refusing to haggle with them. It can be a tough nut to crack - I’d also want to give them the best price. If you have additional discounts, coupons, or gifts you can add to the transaction then that might be an option.
To be honest, muteness is a pretty rare condition here. I’ve worked retail for many years and can probably count on one hand how many mute customers I’ve had. But I have had a couple of regulars and we seem to get along. Treating other human beings how you’d like to be treated is usually the best way forward.