Hello I don’t see what going to Mexico has to do with fixing this application. The only thing I could come up with is that Mexico uses a different network for its communications with telephones. And they may not mesh with the current phone that you have now. The only solution if you need a quick fix. Is to buy a disposable phone in Mexico and try and see if you can download your account down there.

Hello and thank you for these interesting questions.
First off the music does not download to your phone. The music downloads to a remote cloud account under your name. If you were unable to play it and you’ve saved it before it is because the song has either been removed by the person who put it there. Or you have a week or lost connection to your account. As far as saving the song you have to ensure that if you find a song you like that you tap the heart. I save it as a favorite. You can also save it to a specific playlist if you want to. These are the options available to you with this application which I think are outstanding.

Need it fix ASAP going to Mexico and need it

Yes please fix this ASAP

Pls fix this

Same

Me too

Me too

Same.