I think this is more of an outsourcing/language barrier problem than a live chat problem. I had a similar situation calling an outsourced support arm for US Airways. I called and I just needed to get my voucher applied to a domestic flight and the guy simply could not figure it out.
What I did figure out though is that if you press the number for "International" travel, you get someone in the US (Apparently US Airways thinks International traveler support shouldn't be outsourced). She was able to apply my voucher in under 5 minutes.
What I did figure out though is that if you press the number for "International" travel, you get someone in the US (Apparently US Airways thinks International traveler support shouldn't be outsourced). She was able to apply my voucher in under 5 minutes.