Clicks online

I bought 7 items online, I then received an email and sms to come and collect my order at mams mall when I got I only received 1 item. I used petrol to get there. And now I must go back there again not even sure when I will receive the rest of my order. Shops should train their in store staff if they have online shopping also because I didn’t get any help from the store the guy didn’t even understand anything about the order…