They did this in Bo1 I think well I don't think it was actually ban it was just my wifi had way to munch security switched it and boom if that doesn't work it's not your wifi and i'm going to tell you how to unban yourself well I can't say that this works because never tryed it but give it a try and tell me if it worked.
Step 1- Quit Game.
Step 2-Go to the date settings its somewhere in your settings list you can find it

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Step 3-Switch it to 100 days before you where banned/server giving you error.
Step4-Once switch go test it and tell me if it worked

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