Yandex market purchase protection - not working?

Question

Yandex

At one time I swore to buy something through Aliexpress and so on.
But then I came across such a system from Yandex.
I thought everything would be fine here.
As a result, the wrong phone came.
The store could not get away, because. There was even an unboxing video.
He filed a claim with the market, attracted an arbir. Iiii .... After 11 days, no greetings, no answer.
There was some kind of call supposedly from them, where they offered solutions. And again there is no answer.
How can you get in touch with them?
Maybe there is some Yandex support service that is not dynamite?
P.S. I thought about writing a warning to the IT community on Habr in order to warn them against shopping on Yandex, but Habr is not a plaintive book, I don’t want to turn Habr into it, but people also need to be warned. They work worse than aliexpress. Not expected.
What is the best way to do this?