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Convergent was collecting for Midland?
If so, they have to tell Midland you settled and they may not have. Before disputing with Midland I would contact Convergent and make sure they in fact let them know,.
They probably haven't been notified yet.
If they don't update in a month then I would send them a dispute. All they have to do is update though,
Yes, it is paid. Once they up date barrage them with GW letters.