Thank You PDA and Mike for your advises.
I don't know, years ago I wrote a message to ZVEZDA head-office ? And I got a return message from a kind female-assistant who told me our advises would be welcome. But it was at least 4 years ago, and I was told there has been Change within ZVEZDA since.
One of the most drastic being the loss of their Boss last year.
I will try again.