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Dealing with companies of this nature is always going to be a frustrating endeavor. I'm sure the notifications of the late payment are system generated until it is resolved, so just hang in there.
That being said, paying a personal loan with a credit card is just bad news overall. Paying debt with debt (both high interest rate) is never a good thing. I would seek out assistance from a local credit union and see if you can get things moved over. They typically are much better in these situations and can offer significantly better rates.