I too have had my account deactivated with TransferWise, in very similar circumstances i.e. - not really sure what I did wrong? I moved funds from my own company into TW, provided all docs for proof of funds, they accepted funds and all seemed ok. I then tried to move funds from one currency to another (EUR to GBP) and when it didn't execute properly, I complained. A few days later I received an email saying there was an issue with the transaction and it had been returned to them and that I needed to fix the transfer; but when I tried to log in, they had deactivated my account! I have appealed, still early days but will let you know how it goes...