Unconfirmed download and no app support

This app just downloaded itself without me confirming it! I was actually trying to fix a problem with another app (ODE… I don’t even know the difference between that one and this!). I clicked on the ‘purchase’ button, but instead of confirming that I wanted to buy it (where I intended to cancel the transaction), as it usually did, it just downloaded. I tried to ‘report a problem’ and try to get a refund, but just keep getting an error (nginx error!).

Maroba64 about Oxford English Dictionary 2018, v6.2