i think anything you release on public have a higher chance of getting modified, decompiled or rebuilt in a new one. thats you should do first is to secure your apps or codes.
and im not sure if your code was stolen by them since i don't know PoringDevs which is the developer and maintainer of the PandRO. he/she's the one you should contact regarding on this matter. i did not know Skyzone personally but he's only selling a hosting service with additional addons or other stuff. PandRO still a 3rd party program from his offered services. and also you should have a strong proof that they use your code before posting them regarding on this matter.
and also the price is also matter. specially not all can afford AndRO which is totally pricey that's why they offered alternative option.