funds reversed back in to my account

I've made 2 transfers on the 17th for an amount of 68000 and 35800 the other one was meant for capitec and I've noticed that both amounts were reversed back to my account. I called fnb trying to establish the problem. That's when I was advised that Thato from Smart Lock department reversed the money reason being he tried to call me to confirm the funds; the problem is I didn't see any missed calls from any one around that time. I know at times I will have a network problem. I'm available to confirm my transfer. I will be waiting for that call. To compliment Pearl from ***** Department she was very helpful cause she called me back to assist. Thanks Pearl.