Credit One Bank Fraudulent Activity Las Vegas Internet

Credit one staff allowed someone to access my online account by allowing them to change my address. They locked me out of  my online account. when i was finally allowed access, I made a $500 payment online from my checking account (May 3).  two days later my online checking account reflected two payments to credit one. One was the $500 payment then one day later a $600 payment with an express payment fee.  When I went to check my online credit card account I was locked out again.  I called, cancelled this card and they sent me a new one. They launced an investigation which would take 60 days.  After I set up my new online credit one account, two days later i was locked out again. I became suspicious and decided not to use the credit card and pay off the transferre balance after they completed their investigation.  On July 4 I cancelled and paid off the credit card over the phone. it took a harrassing hour and they charged me interest on fraudulent charges and an express payment fee.  Good riddance. on August 14, I received a statement with another $609.95 charge to my closed credit card account. i called and they launced another investigation.  this is inside work and i want it to stop.