I do not know anything directly about this company, but just reading the posts under this thread, I would be cautious. I see a few neutral posts, but knowing the low wages they pay their writers and that they terminate a freelancer's agreement/account (see @hawkeye29) without further discussion is alarming. Note, however, the details leading up to the termination are not clear. It seems that the writer took the assignment, confirmed it verbally, then gave it back the day before it was due. How long had it been since the order was assigned? How many orders had the writer completed before this incident? Were other orders late or cancelled? There's many factors that could impact the outcome.
They simply reasoned out that they already told the customer that the order is already being done.
This is common with most writing sites. The moment the order is submitted and paid by the customer, it is considered "in progress." I don't like this business model as it is deceptive. Simply because a customer orders a paper and pays for it online does NOT mean it has been assigned to a writer. Unless the company is one of those that will assign anything to anyone, an order must go through processes after it is placed and paid. However, if the company informed the customer the order was in progress AFTER the writer confirmed, that's a different story. One scenario that would possibly validate the company's decision to terminate would be if the writer accepted, reconfirmed, and had the project for several days only to bail at the last minute. Still, it depends on underlying factors. What was the emergency? Serious illness or death in the family would be understandable. Otherwise, deadlines are deadlines and should be met. At the very least (assuming the writer was not in the hospital or planning a funeral), it would have been better to complete that order and then let the company know you would be unavailable for a period of time.
There's a lot of unclear aspects to the issue, but at the end of the day, most companies (in all industries) can terminate at will and have no real obligation to say why... especially when dealing with freelance writers.