Review about job: Wildberries - Moscow

I got a job as a designer with a salary of 55,000 (the salary is gray), during the probation period they promised 50, I worked for a month, everything seemed good, I tried to work just like everyone else, staying a little longer every day, there were no complaints during the month, after a month the boss said that their designers are stronger than me, but they are willing to keep me for a salary of 40, I asked for a day to think it over, after I refused, the boss said that I don't deserve even 30, (what I think is pure rudeness) The salary for the best designers is generally meager. The team is good and cheerful. As for payments, they paid everything.