Time to switch banks... FNB sucks.

I was hoping not to have to write this but I am not getting a response to my emails.

On 4 April 2022, I was pre-approved to increase my credit card limit. I opted to take the increase amd everything went through. I received an inapp notification that my credit limit had been increased and that I would receive a DebiCheck Mandate. I waited 24 hours and still did not receive the notification. On 5 April I sent in an email only to be told that my application is being reviewed- for what??? I was pre-approved and was told that my limit was increased!! I responded asking for a time frame as to how long I need to wait and was sent the same copy paste response as previously advised. I don't understand why it's under review if I was pre approved and it was all accepted. Furthermore, it has been SIX DAYS!! What review takes SIX ****ING DAYS to review. I think I need to switch to another bank because clearly FNB don't honor their offers amd don't care if they loose people.