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Credit one is difficult to work with. Try asking to PFD for a while, and if that doesn't work then just pat it and GW them to death. Even if they keep saying no, you have done great so far. Open up a few CCs, try Cap One prequal or go get some secured cards, to reestablish a positive credit history going forward. After some time of positive credit use, that charge off will lose some of its bite.