Carry On Luggage - Can I speak to a human being please.

I cannot seem to get hold a single human being for answers on my carry on luggage bag. The dimensions on the website make no sense when I have used the same carry on bag for every other international flight I have ever taken with no issues. I just want to know if my bag will be okay for the flight because I’ve never used any other bag and I don’t understand how the flight cannot accommodate my bag. All the answers I get are AI generated answers.

Saflyair dimensions: 56 x 36 x 23 (why) and mine are 51 x 29 x 27

Can someone for the love of all things holy help me, like an actual human being. Mind you this bag I’ve been using for the last 10 years on any and every flight I’ve taken, with every other airline but for some reason FlySafair cannot assist me or respond with a human on the other side or the phone, that can tell yes we can or no we can’t.