Can't get a log that has been wiped. But yes, Mullvad are only as good as their word. The other more expensive and complicated alternative would be to host your own vpn server, which still has the server provider as the trust anchor.
Tor is the only network sufficient enough to thwart malicious state actor's efforts.
Rumor no more [0]
No sane person should want the state marking them an enemy. Playing that game quickly becomes a contest of who'll be the first to blink. And you will in the end, blink.
It seems fairly obvious once you trace the funding on a lot of nodes. Plus that court case that got dropped with the child porn guy - they dropped it because they refused to show how they found him. 0day most likely.
Therefore, you already have to trust them, in which case you might as well just wire the money the old-fashioned way.