I had the wrong strain put in my bag a couple weeks ago, an eighth of sativa instead of indaca. I had opened it before noticing, in pain and just wanted it to go away.
I called, was told to bring it back to be disposed of.
I have no issues with making an error, happens to me all the time, but disposing of the product, and having to get a ride back there to trade it, knowing you are disposing of something that would help me an extra day, really turns me off.
I hope you find other ways of correcting your errors, like letting the customer keep the mistake.