Disgusting Service from Nimble Group

I have to inform everyone of the extremely poor services and **** attitude from this company and their employees. I received a call this morning regarding a Netstar account I had which I fully settled quite a while back. The agent to call me was Siphosethu Bengu and his line manager is Lerato. He had the worst attitude you could possibly have for a call center agent. He spoke over me, raised his voice, tried to force his opinion on me. He even refused my right to speak to a manager claiming she was in a meeting and he will get her to call me back. Remember I paid this account fully and previously received a paid up letter along with the notification from Julia Nxele that my name was removed from the ITC, but I still received about 2 to 3 calls daily from Nimble. On top of being harassed, I receive a call so early in the morning from an agent who feels entitled and has absolutely no etiquette or ways of speaking to a customer. What he fails to know is that I am a call center manager for a prestigious company and train my employees to have basic soft skills when speaking to our customers. I am deeply disappointed and upset at the call I received this morning and would request that a manager call me as I want action to be taken against the employee and I need confirmation that I will not receive another call again for something which was settled weeks ago.