bad attitude from manager

I had a rain check for a prod that was on promotion. I phoned last week and the mgr Indian gentleman was helpful and told me to come in as there is lot of stocks in. I made arrangement for this weekend. I phoned 08/09/18 approx 15:45 and he was not and spoke to a female manager who said she was standing in. Her name is Mrs Chetty.. She was not helpf and rude to me on phone, I asked her why she is not being helpful. She told me no stocks. I told i spoke to am mgr last week, but was interested.I gave her the reference number and she told me she will call me back shortly, no call received when i went to store I was assisted by Rosemary who gave excellent service. There was lot of stocks on shelf I was suprised . I only received call from from Mrs Chetty at 18:35. I asked her why she took 3 hrs to call me and just brushed off saying she was busy. When I told her Im goin to complain whe didnt care a ****. How can a senior person give such pathetic customer service. Not being helpful and being rude. Having such a bad attitude does not help