Ok, so I did just that, a bit over a week ago (by email, since as I had stated before, I do not use Discord or any SNS).
Haven't received any reply so far...
Copy here straight from my mail:
How to close Personal Chat?
Hi, I have been learning the game by myself and progressing steadily, but I have an issue with some players trying to tell me to do it their way, insisting, and not accepting that I want to learn the game on my own.
I have several decades of gaming experience, and I am NOT interested in rushing to end game, which they cannot understand.
I tried various things, but couldn't delete the conversations they started.
If the feature does not exist, it need to be added...
Fafhred, player ID 7E95AE57232E710E
I already tried that before.
There are 2 small icons, neither of which has a tooltip or look "like a block/stop signal"
1 look like a ! in a circle, the other look like an 'end limitations' road sign.
Playing on smartphone, if it is different on others plaftforms.
But I drew my conclusion from this reluctant support....