I did this with EA actually, I was banned for no reason from Apex Legends, EA support told me it was an EasyAntiCheat ban, but I wasn't banned from other EAC games which made me suspect that wasn't true. When I googled around I found screenshots showing that the ban message ingame would have the text "Banned" after the default "client banned" message.
I contacted EAC who confirmed I was not EAC banned, I informed EA of this and just got the default "We cannot discuss bans blah blah" reply.
I then ran a GDPR data request, and after 3 weeks I got a massive dump of all my info, which included the ban reason.
The ban reason was N/A, not blanked out or censored, just N/A from the data dump.
I raised this with EA and they just kept telling me they can't discuss bans etc. I managed to get it escalated eventually via a complaint which lead to my account being unbanned and I got it confirmed that it was an erroneous ban.
I contacted EAC who confirmed I was not EAC banned, I informed EA of this and just got the default "We cannot discuss bans blah blah" reply. I then ran a GDPR data request, and after 3 weeks I got a massive dump of all my info, which included the ban reason. The ban reason was N/A, not blanked out or censored, just N/A from the data dump. I raised this with EA and they just kept telling me they can't discuss bans etc. I managed to get it escalated eventually via a complaint which lead to my account being unbanned and I got it confirmed that it was an erroneous ban.