I had the same problem long time ago and I contacted a lawyer. He suggested that I write a letter in which I give the company 2 weeks to transfer the money with

I had the same problem long time ago and I contacted a lawyer. He suggested that I write a letter in which I give the company 2 weeks to transfer the money with the threat of calling a lawyer if it is not transferred. And only then get an lawyer. The company transferred the money and the problem was solved in my case.