Despite all the bashing CapitalOne seems to get on this site, I am a very pleased customer of this company. They successfully allowed me to merge my Visa Gold card account with a $600 limit into my Visa Platinum card account with a $4100 limit, which was quite helpful in allowing me to cancel an AF on the gold card (no fee on the Platinum). While it was not a "conversion," it still showed me their willingness to work with me as a long time customer and satisfy my request. If I were you, I would follow up and ask to speak to a supervisor to achieve some satisfaction.