FNB - Delay in processing card transactions

I visited an FNB branch today because my bank account is showing a negative R308 balance with a R125 still in Pending Outstanding authorization status. I called the call centre twice and the last I was told FNB had resolved the issue only to find the same amounts still in negatives. I was told to wait for next week when I had received an sms from FNB saying the following : "FNB. There was a delay in processing card transactions on 18/06/2019. This resulted in incorrect balances showing on your transactional bank account which has now been resolved. We apologise for any inconvenience caused. FNB, a div of FRB Ltd. Reply STOP to opt out"

This is ***** if FNB is making their customers pay for their problems without notifying the customer that they had a problem prior me making an enquiry.

Now I am unable to access my Savings Pocket because of the negative balance amount.