Wish complaint: Cancelation

I have filed through complain.biz. I have paid for a bunch of similar stuff by mistake. That’s a lot of items in my cart I just wanted to choose from but when I finally processed payments for the two final stuff, all the others were also paid under one order.
My card was getting rejected so I used another card, only to find out that the first payment went through. I asked customer service to resolve the matter, persistently asked them before the cancelation window closed, but they didn’t seem to understand the
problem. They were just teaching me how to cancel. Of course I know how to cancel as I have canceled some items in the same order but I don’t understand why I couldn’t cancel all items when it hasn’t even been an hour since payment. The app s kept saying I couldn’t cancel anymore. What happened to the 1hour-8hour cancelation window? I tried to be as much detailed as I can but to no avail. It’s like talking to robots with scripted answers.