FRUSTRATED/ NO CALL BACK

I am due to receive cash back payment , at first I was told I will not get it and then I was promised it will be paid into my account by the 10 November and then I phone again only to be told the 23 November and still nothing. I called them again, one occasion I was told the person who dealt with me will call me back, no call , I called again yesterday and was told I was going to be called back this morning, its afternoon, no call .I need an answer as to what is going on. I have been the one doing the calling , all the time, I am so frustrated .