Is Supercell violating GDPR by not fulfilling all Personal data requests?

Recently I have gotten back into Clash of Clans and I was curious to when I first played it so I requested my data via the in game support but I was accused of "account sharing" and that they will not provide me my data ever. I used to have to travel between countries a lot with my parents so yes I accessed Supercell games from all over the place but I haven't done this in 4+ years now and …

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