Hey,
I’ve also been banned quite a few times for having high ping. The server bans you because it is coded to think that you are using a hack called “Ping Spoof”. Ping spoofing edits your packet to the server to make it seem like you are lagging but you are not. Ping Spoofing on Future Client makes your ping go to 3000+.
it is likely that you either had a network cut which then came back immediately after a few seconds, or that your internet needs to be upgraded.
I understand your pain as I am in New Zealand which has experienced Hugh internet issues in the past year.