Multiply Online shopping

More than a month ago I tried to purchase a simple ink cartridge.I had difficulty purchasing with my credit card and thought the website had issues.I tried again the next day-no luck, and the next day.I then called customer care, who could not help me.I called again a week later.Someone assisted me and the transaction eventually went through.Or so I thought.Money was deducted from my credit card, but after 3 weeks I still did not receive my goods. I called again (5 Sept) - they asked me to send a credit card slip to them proving the money went off. I sent it immediately. Nothing.Not even a response.2 days later (17 Sept) I called again. They asked me to send credit card slip.Again.I send it through.Once again, nothing. Later they call me and say it is sorted. So I try, but it is not sorted. So I called them again. They asked me to send a credit card slip (18 Sept). I said I have done so multiple times. They say they are working on the problem. But no, they aren't. Later out of frustration my wife calls(7th call!). They say they will follow up. But they don't. No response. I ask again on the 21st Sept. No response.Still have my money.no delivery.no feedback. Exceptionally poor!