You have been given MULTIPLE warnings at this point with previous restrictions and yes the restrictions are warranted as when you have an unstable connection, you ruin the experience for other players.
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I was clear, I fixed the problems after the first ban.
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Obviously you didn't fix it well enough because you got a second ban. And then you did nothing about that so now you have another one.
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.......BYE
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...that is what Destiny is saying to you in PvP right now. I'm sorry that the truth hurts but you have NOT fixed your connection problems if you continue to get restricted. What exactly did you do to fix your problems/