Rare issue: pressing the menu button ir left shutsdown the player

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Background: Firmware working and has been upgraded numerous times. The problem, when I press the menu button, the left or subject the player to minor shock it turns of. It has not come into contact with water. 40% of the time there is no problem, but if the player shutsdown automatically and i reset it the former occurs. I purchases it in March.

If this is my fault and not meizus how/who should I get into contact from meizu and more importantly how much will the repairs cost and how shall I send it (From the UK).