NBC HOLDINGS IS VERY ***********

I was contacted by NBC on 3 June saying that I have additional funds due to me by my previous employer. The lady who called me and sent me a mail was Cheryldene Van Wyk. On 15 June I sent through the required documents. From there I didn't get any feedback from her I then followed up a week later, then 2 week later than a month later I called and someone else picked up and said they would pass on the message to her to call me back. Still nothing. I sent another mail copying in Zareena Amod and still no feedback. On 2 Aug I called again and spoke to a Vivian who assured me that she will help me and asked me to send all email trail with Cheryldene to her and she then advised me that Cheryldene has since left the company. Vivian assured me that she will get back to me as soon as she gets my mail but still nothing from her I have tried to call NBC and the line just rings. With money that is due to me I expect a response from NBC and I want to understand why they are not getting back to me - this is so unprofessional. I am tired of following up and calling, what else am I supposed to do. Next step from here I'm taking the matter to the Ombudsman.