My shares disappeared during the day and my margin account with...

My shares disappeared during the day and my margin account with Macquarie Prime showed a debit for $4300 followed by a credit for the same amount, but my equity has dropped by $4300. Macquarie put me through 5 different people when I called and the last one didn't call back with an answer. There is nothing from the ASX and It's troubling that I bought on recommendation by Fat Prophets and their is no news from them either. I guess we may have to rely on the papers tomorrow for some explanation.