Clicks harbour bay Simon's Town, customer trust broken

Just bought Panado Capsules at Clicks harbour bay, Simon's Town and when I opened the box there was only 10 capsules and the box clearly states 20. I was already on my way home, stopped at Clicks Fish Hoek and they were, as always, very professional and helpful. However, I felt a bit uncomfortable because there's no way to truly prove that I haven't taken the other capsules out of the box. Going forward, instead of having seals on the Panado box rather consider sealing the box with some tape or any other methods to ensure something like this doesn't happen again in the future. Clicks Fish Hoek, thanks for replacing the Panado's and in the future as a customer I'll have to also check for myself to avoid these uncomfortable situations.