Poor service

My standard bank credit card has being handed over to Nimbles and I had queries since last year December. On Friday and again on Monday I spoke to Zuraya who went to call Carlyn and never returned to the phone. The other consultant came to the phone and said they were arguing and they don't want to attend to my call now I rather leave my details and they will contact me which I refused. Then Nashiefar came to the phone and promised to come back to me the following day(Tuesday). On Tuesday I then received a call from Nashline saying the matter is now with operations manager and they will contact me. its now Friday and I haven't heard from Nimble. Nimble have been changing figures on my accounts as at November 2015, I was owing about R2900 after I made a query, it was about R1800. In December, I was given a 20% discount to settle my account which the settlement was R1150.00. Now as at February 2016, my total outstanding is about R1900 and I've paid R700 for both December and January. I also paid for February yesterday (R350) as per our arrangements. I want to settle this account as it affects my credit profile