Card limits and Available balance

Good day

I just spoke to 3 of your agents 1 from general enquiries. 1 from digital support and I Can't remember the last 1

None of them are able to assist me with my card limits. when I increase the limit on the app it says it's increased but it gets declined when I try to purchase anything over R3000 so does this mean I need to carry cash.

My current and available balance are never the same and I don't have any pending transactions, is anyone able to assist me with these 2 issues.