Equal treatment

So I went to MTN bought a product but was never advised that it was not suitable. Well I went back after a good hours realizing that it wasn't a good one. When I got to the store I was told to wait for the manager he will refund, but hallo I might be interested in something different. But then I can't get anything else cause the person selling the product just knocked off(ok) . The manager decided to ignore me, passed me kept on looking at me, as I waited for about 20min while he was busy telling his colleagues why I came around, which really was the irritating part cause instead of acknowledging that I'm there, you pass me and tell others what they can do with me. So one sales guy approaches me and tells me to buy a different product next time and in my head I'm like but I haven't even told you what was wrong with this one. So because of the service I was getting was confusing me. 1.No greeting 2. Told me what to get next time without asking me what was wrong, with what I initially bought. 3. Getting a refund seems to be hassle as I've been waiting for it for a week. So I called back the store during the week (spoke to the manager ) to remind them of my refund. Manager tells me the guy that took my details was not at work on that day, so he doesn't know where my details are he will call when he comes back to work. My response was, "that shouldn't be a problem cause I can give you my details again. That was done and he promised to give me a call when he was done with it. It's acxatly 7 days, no call, no refund no apology the system is down we will try again as they always tell us.