Can't turn cellular data for some apps
I've been experiencing a strange issue lately: I can't turn on my mobile data for Spotify (iPhone X, soft. ver. 13.3). I have already tried to turn it on and off repeatedly, to turn on and then off ariplain mode, to restart the iPhone and eventually to delete and reinstall Spotify but none of those worked because just after I close the Settings the switch keeps going back to "off" ; eventually I found myself with the app constantly turned off so that I can't even log in. Is anybody else having this problem? How should I solve it? Is it necessary to contact the closest Apple Center?
Thank you in advance
iPhone X, iOS 13