Replying to Yurt owner owes me money

So we went on a yurt trip a couple of months ago. Venmo'd the guy the money in advance, which included a mandatory guiding fee since it was our first time there (pretty common). When we met with the guide at the trailhead, he asked if we felt we could go up on our own, to which we said yes.

So afterwards I asked the guy if we could get a refund for the guiding fee, he said yes. 2 weeks later I followed up since I never received the money, he said he had a phone issue and would take care of the Venmo within the week. 3 weeks later still nothing so I followed up again and no reply. That was a week ago.

Fairly small amount of money, but still, don't really like getting stiffed.
What would you guys do?