Can’t buy WoW Token - can support help?

So I’ve been trying to buy WoW Tokens so I can trade them in for Gold but whenever I try in-game, the pop up opens, window goes into a black box, the rest of the screen turns a weird blue and then everything comes back a few seconds later and NO purchase!

I’ve heard elsewhere that it’s a Mac thing and that I have to get support to do it. Well, can’t open a ticket in-game and when I do on the website for some reason it doesn’t go through.

I want 2 tokens on this Character on Maelstrom. How am I supposed to do this? I’m literally tryin to give you money……

Thanks all,
~G