I'd start by calling the SPCA back. Sorry, I know the rules too well, and the law states 'adequate food, water, shelter and care'. If these birds are tropical and they are not in heated buildings they are not adequately sheltered. If there are sick or dieing birds the shelter or care has to be under scruteny. Call them on it, sometimes it takes some pressure for them to live up to their calling sadly, but they have the laws so it's theirs to work on. Often the SPCA's are affiliated with the local pound or municipal dog control and don't want to do much except collect money for dog tags and impound dogs not wearing them for even more money. This is changing but not there yet in all areas.
Sadly what you did that day, just before calling the SPCA was seen by them as 'care' and probably hurt the case you need to build. By refilling the feeders/waterers you made it look like they had care..... Gave them toys so it looked better to an inspection. I know, I'd have done it too, but look at if from the inspectors point of view, they hear of the conditions repeorted then look at what they find.