RCS Coricraft horrible experience

I have had an unpleasant experience with RCS Coricraft. I recieved the card in store and requested that the card be on a 6 months interest free plan. Months later I am still calling RCS coricraft as the card was not placed on a 6 months interest free plan. Everytime I call the call agents tell me that they will escalate the issue to their admin department. I have called countless of time and they keep telling me the same thing, when I request to speak to a supervisor they tell me that the issue will he addressed. This is so frustrating as I am supposed to be making my final payment at the end of the month and the interest that was charged has still not been reversed. Very disappointing experience.