I mixed VDD and VSS plane in a 4 layer PCB - Does it matter?
Firstly, given the information you have provided, there is no difference between the two scenarios. Signals are signals and there is no information in the question to differentiate signals that might need a better ground-plane from those that aren't so needy.
So, if the 3.3 volt rail is properly decoupled with capacitors fairly regularly then there shouldn't be any repercussions on the swapping of layers. If the 3.3 volt supply has moderate noise there may be some issues arising with sensitive analogue signals that are relying on a clean 0 volts as a ground-plane. Only you can decide this.
In future, you should mark inner layers so that the board manufacturer can build the stack in the right order. Maybe you did this? Maybe the board manufacturer screwed up?