Manipulation of clientele and no transparency of processes

This, is the most atrocious way of manipulating your customers. When logging into my online profile I am notified that I am pre approved for an increase to my credit card limit. I had received an sms stating the same as well from fnb. I proceeded with the application on Saturday and completed all the details as required and submitted the application accepted the pre agreement. I immediately received confirmation on the fnb app that the limit has been increased and is immediately available. The following day the limit increase was not reflecting so as a premier customer I contacted the online banking team and they said they cannot help and I need to contact again on Monday. Today I contact again and am now told I need to call the limit increase department. I proceed to call them and now they inform me that the pre approved application is not approved and is pending manual processing after I complete more documentation. When asking when was the information conveyed my question is ignored and I am told that I need to complete a document before the application will be processed. I ask again when was it conveyed and the person says it will be conveyed when the application is processed in 3-5 working days. Here is the topper, when I ask why a pre approved application needs to be manually processed again after confirmation of the credit being awarded I am told that they cannot explain it to me.

Now I am sitting in a branch waiting to be assisted for an online application that has already been approved to be approved again in, you guessed it, 3-5 working days.