Wifi not working - can't download music from Spotify

I haven't been using Wifi on the watch since I bought it. However, itI now need it for downloading songs from Spotify.

Once I try to download a specific playlist to the watch, the watch tries to connect to the Wifi network that I set up through the app on my phone. After about 20 seconds I get an error saying "Can't connect to Wi-Fi network. Error 0700".

Any suggestions on what to do?

Before Spotify was released, I transferred multiple songs to the watch. It now seems I can't access them because Spotify is the preferred music service on the watch. Any tips in this regard as well?

Thanks.