It's been almost 3 weeks now and no purchases on the market are functional.

At first it was various error messages, all of which were fixed either by waiting, rebooting or relogging in.

Now purchases on the market pretend to work, I get a confirmation on the steam app on my phone (which is my secondary auth device) and after I confirm the transaction, nothing happens.

There's no error, no message it just goes away as if nothing was purchased or requested to be purchased.

Steam support is useless, it just sends you in a loop of FAQ answers completely unrelated to the issue.