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As long as it has a balance, it is hurting your util something bad.
Do you have other CC? What is your util on those?
Closed accounts with balances are still included in util calculations, but no CL is included. So, you have $2800 added in your balances, but no CL from that card added in.
Had you missed payments on the card before they closed it?
I seriously doubt they will reinstate esp with lates unless you PIF