My question involves collection proceedings in the State of: OK

I sent a payment to the credit card company and they cashed my check electronically. We had the bank send them a letter showing proof they were paid. The credit card company says they cannot accept anything other than a cleared check, but because the check was deposited electronically our bank received no such check. I have been fighting them for 4 months now, and it's trashed my credit. Would anyone mind tossing a newbie some advice?

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