Akai DAB radio stuck on one station with no sound

Akai DAB radio stuck on one station with no sound
My Akai DAB radio (A61018 ) has suddenly just got stuck on one station and doesn't play the sound from that station. It seem like it needs a factory reset but there doesn't seem to be an obvious way to do it. Have left it pets off for several days but it still does the same thing. Can someone help please?

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