CREDIT ONE BANK, N.A. inaccurate accounting documentation las vegas Internet

I was fraudulently charged late and service fees after the account was paid in full.  This occurred just 4 days after I spoke to CSR who removed all fees.  Upon reviewing the balance online through their website, I noticed though fees were credited back to account, they then charged me additional fees.  I then called the 800 number and after an hour and a half clarifying their mistake, they agreed to remove all balances on said account; with the exception of $5.96 which I paid through my debit card, as they would not allow check payments.  I then called back, one day later to verify that everything was correct and this particular CSR told me they could not honor the latest waived balance. Knowing that their accounting procedures are deceptive as well as unethical, I am compelled to expose their practices.  Please note they do not allow any email correspondence or provide on line message service  through their website.   This is unacceptable and I'm furious!