Coin error

Did you destroy them? Or did you refund them? 2 different options.

1 as you are aware gives you nothing (Demolish)

2 is Refund within 24 hour period get back what you spent(coins/credits).

Hi, demolish isn't available when a Refund is possible

if you collected the reward then you lose out on a refund on the buildings

Quote from LACoFD1014

if you collected the reward then you lose out on a refund on the buildings

No you don't.