Ordered a rainbow cake and specifically asked for ...

Ordered a rainbow cake and specifically asked for the cake to not be cut into slices in which the they said was ok. When I got to the shop it seemed like they did not have the cake ready so they got random slices and placed it into a box. I asked why it had been cut and the lady stated they have to cut the cake so that it can fit in the box.
Was not happy at all as this was supposed to be a birthday cake. I will definitely not be ordering again!