My Money vanished wow capitec

Wow way to go capitec *****ing your clients money. So I sent R300 from my flexi save account over to my main savings account yesterday and it shows on my app that the R327 is available but as I'm about to pay for my groceries the next minute it's shows 0.0 rands on my app in my account so I call capitec head office today and I downloaded a statement and it's clearly shows the money was sent over but no sign of what happened to it it's just vanished. The lady at head office says it was purchasing that was processed late but funny how it shows on my statement that the money for my previous purchases did go off. I've had it with capitec im changing banks but I first want my R300 back