My Deezer wouldn't work yesterday and was asking me to log in as it wanted to check my subscription. I didn't bother using it and logged in today instead and used it while driving using mobile data. The playlist is downloaded, but it wiped out my mobile data usage. I've checked in settings and Deezer is showing that it has used all my mobile data over 24 hours. Even though I've actually only used it for around 2-2.5 hours. Advice please as I don't want this to happen again, I had to pay £21.00 for more data as it doesn't start again until 9th May.  If it happens again I'll have to cancel my subscription. Thank you, Carol in Buxton