Originally Posted by
Deejay09
I am very confused as to whether or not DOT regulations apply to Australian citizens and how this can be enforced.
Your nationality, citizenship, residency, etc. do not have an effect. What matters is whenever your flight begins or ends anywhere within the U.S.
If you have ever discussed with any of the airlines (Note - the airlines, not the TA you booked from) you mentioned, you have done your part. Simply file a complaint with DOT and the airlines will be forced to handle the rest.
Note - the TA situation can be kind of complicated. Even DOT has no jurisdiction over TAs, it still has the jurisdiction over the airlines. The airlines should be able to work with you on this. However, given that you paid a 3rd party, you will still need to work with the TA on how the money goes back to you (as the TA will usually receive the refund first unless the airline received the money directly from you (your statement will tell who was the one getting the money)).
Originally Posted by
Deejay09
My bank is also not processing chargebacks stating that a credit is a reasonable resolution and taking the airlines side.
Your bank may be in violation of any local consumer law. However, I would not comment further as this is related to DOT applicability.