If you send transactions with 0 fee, they take few days to be confirmed - or they may not even be confirmed. Nothing we can do about it. That is bitcoin network. We do not make deposit cofirmations.
That's probably the problem. It's only been the last couple of days though. I normally make at least 2 deposits per day and they have always confirmed in less than an hour. I've added a minimal fee now and will see if that speeds things up.