Cheated on my order

I was told that I had a glaucoma, and the Dr subscribed me eye drops. They were quite expensive, so I looked for a cheaper pharmacy online. I found Canadadrugs.com, read some reviews about them, and decided to order. I ordered 5 items, but received only 4. I called them, and told that 1 item was missing. But they kept telling me that they have sent me all that I have purchased.
They are liars, and I can’t believe I read the wrong reviews about them.