Complex sentence: Instead of using intermediary banks to make transfers, TransferMate set up their own accounts (200 accounts in 50 countries according to the company), ostensibly allowing the company to transfer funds through their own banking network.
Split into simpler sentences: Instead of using intermediary banks to make transfers, TransferMate set up their own accounts across the world-with 200 accounts in 50 countries according to the company. This allows the company to transfer funds through their own banking network.