Poor customer service

a year ago i contacted them to settle old debt, i had an agreement in place with a consultant named Norma, in September 2016. she had a settlement agreement in place with Capitec and was handling the account. My phone was hacked and email account hacked in late september 2016, i have a police case number for this. I immediately contacted nimble and let them know that this had happened, and requested that they resend me confirmation of settlement value and correspondence between myself and Norma for my record. I phoned them repeatedly for a month and no one would provide me a voice recorded call or email of our agreement. I therefore agreed with them to pay R50.00 per month until they track the settlement on voice recording or email and have a manager contact me. I am still waiting for a manager to contact me to resolve this situation. in the last month i am harassed daily by a new person each time and i have to explain this story. They are rude and disrespectful! Even the manager/supervisor i spoke to 2 weeks ago was rude and laughed at me. they are arrogant and not even prepared to acknowledge my history of this situation. I want to resolve this issue as it reflects poorly on my credit score. can someone please assist me with this