Deposit put on hold

A customer deposited R20000 in my personal account on the 20th of May 2020 but it disappeared from my available balance the same day. It shows in my statement but it's not available. I went to capitec branch last week and they said they are waiting for an email to check who put the deposit on hold and they would call me back. But it's been over a week now they didn't call. I'm really not happy about this. I don't have time to go to the branch I work far.