It was the night before Alyona Mysko’s birthday when she got the word from her financial manager. The founder of software company Fuel that provides financial planning for startups, Mysko was, she says, still working at home in Kyiv well into the night of July 22 when she learned that the company’s bank account was being cut off. “(Tuesday) was my birthday, and the whole day was a situation,” she said. “It was a present from Mercury.” Mercury is a U.S.-based fintech firm that provides banking services, specifically focusing on the startup market. It was a go-to for many firms with Ukrainian fo…