Rude and dismissive attitude on refund

Earlier today I went to Carnival Checkers hyper to return 3 products that I bought on the 1st of June. When I bought the products I still had some that I had been using and really I had no reason to open and check the new ones that I bought for defects. I have been using this face cream for 2 years and by now I know how it smells and the texture.

So now upon opening the new face cream that I bought from checkers it had a funny smell and and the texture was different. I used it for a week and the smell got worse for me and I started having skin break outs, I went to checkers to ask them for a refund on the products. When I got to Customer care desk I found this lady who nicely attended to me and I explained my situation and she asked me to wait, few minutes later she came back and told me that the manager says I must contact the company that the product belongs to, and I was not happy with the response as the packaging was tampered with by the store and sealed with a sello tape, when I asked about the sellotape I was told they open all boxes and put in some security thing inside then seal the boxes with sellotape the lady suggested I speak to the manager.

I went to the manager's office, I found her with another lady from House and home. I asked if she was told about my story and she dismissively(as she wanted to continue her chat session with the lady she was with) says yes and in the same breath tells me to call Portia M as the period for a refund has passed, I asked her where is their return policy as it's not written on the till slip,and she said it's on CPA and I must go read it there and I asked why must I go read it there why can't Checkers provide or at least have it on their till slip as they have customers returning things every day, and we went back and forth about the return policy and at some point she says they have terms and conditions on the till slip which covers them. I looked at the till slip and it said nothing about the terms and conditions, seeing that excuse does not work then she went back to say I must go read about the return policy on CPA. I her asked would she send my mom who has no access to the internet to go read the return policy on the internet, in any case why should I go read about the return policy on the internet when my transaction was concluded in the store by the till point not online.

She then called a certain "Meneer" as she referred to him over the phone and explained to him in Afrikaans disregarding how that might be offensive to a customer whom chances are does not speak the same language as her, luckily for me my intermediate Afrikaans paid off in this regard.

And the"Meneer" on the line said I should be reimbursed for the 2 products that are not opened however not in cash but I should be given a gift card rather, now I am forced to shop at their store and stuck with a product that I can't use. (after dealing with this lady I don't feel Checkers deserves even a cent of my money being spent there). Off she goes to her Friend at House and home (the friend left in the middle of our thing) Just when I thought my fight was over, the lady that was to give me the gift card, continued to add on to my frustration by insinuating that I opened the other boxes as the sello tape on it is not wrapped the same way as the others. Like really now! the attitude in this place is disgusting.