With regard to the great load on the main projects, it failed to perform the order, here it is not right - I admit. And that happens.
As for the customer - responds not in time - is busy or the answer will come in a few hours. A customer who pays a little, wants a lot. Also, instead of solving the situation peacefully and signing up in a personal letter or asking for the return of money, the customer decided to write a negative review.
For what a lot of thanks. Notes to be taken into account. We take measures