Today, I received a message from the support, that they apologize for the delay and if the sum is correct... I wrote them, that they should check it once again, if the crypto belongs me and I am free to use it.
The answer:

Summarize, they have to check it atleast 3 times. It takes 11 days from the day what I sent to receive it.. I am completely out of energy to handle with the support that is completely incompetent.
So now it is clear that they have knowingly gave you this amount of cryptocurrency and you are free to use it, so now i think this topic is closed.