Systems failures inconveniencing customers, what is the point of a Credit Limit then?

Disappoint me again Mabena(ABSA). How on earth do you lock my credit card account based on something that your system allowed. What is the point of setting a credit limit if your system will allow some purchases to go through?

First and foremost your notification system(SMS notification) sucks, it took more than 24 hours for your notification SMS to come through, to notify me that I have gone over my credit limit, little did I know that your system will then lock the whole card over a lousy R101.

My first question would be why did you allow the credit card spending to go over the limit, what is the point of having the limit then?

Secondly, why does it take your system well over 24 hours to update, I have paid way over my Credit limit on my credit card account in order for me to utilize the funds for my trip, and now suddenly I cannot use the funds because your systems app**** some flags on my account for something that I never asked for.

Moreover, your call center person - Shuba, was not helpful at all, she kept on saying the system will update tonight at 19h00 and then hung up on me. It is not 23:34, I'm flying out tomorrow, I cannot use your useless credit card even though there are funds in it. this is how you lose customers.

And No guys we are not talking about thousands of rands here or months over the limit, which I never asked for, it's R104, now I can't make any reservations using your card.

Thanks for nothing ABSA.