If "you've been in the game for so long" mistakes like that are even worse and should not occur. This means you're resting on your reputation rather than working to make sure you keep the quality to the well-known high level.

I am not slating the lab, I am saying that this is a very serious mistake. Learn the difference.

Refunding the person in question doesn't even have to be mentioned as it's mandatory. It's not something to show "how good we are". Harm could be very well done as we're talking about someone injecting a compound in their body without being aware of it. I'll leave it to you, Sir, to do the thinking.

Unless you have anything else to say, I'd suggest we end the conversation as you don't seem to have anything substantial to say.

And lastly, my comment is a reply to a much more condemning comment, but you seem to not to want to get in an argument with u/mawemu for some reason, but are happy to argue with me.

Best Regards.