I mean fair enough, i use this version of Spotify and don't pay them a single cent: https://bestforandroid.com/apk/spotify-premium-mod-apk/
But if I was a paying customer i would be pretty pissed opening Spotify the first time on my 3 week travels and seeing this crap :-O Funnily there isn't even an option to change the location as suggested. Neither in the modded app nor on spotify.com on FF mobile.
I've never had an issue with pihole (i run them on the same device). Pivpn ibstaller typically detects pihole and juat sets it up as pivpn dns but you could also have it not do this in the installer
Yeah, I have no clue where it went wrong and I'm not exactly technical enough to diagnose it
Best move is to try to do pivpn installer again and when it says we found a pihole installation do you want to use pihole with pivpn say no. If it still breaks uninstall pihole, install pivpn l, then reinstall pihole