I would also first check whether their services are legal. As for me, I trust Instagram and I've ordered many services from different Instagram pages and I haven't had an unpleasant experience associated with this. But I agree that there can be scammers everywhere and you should be careful and double-check the information. I also recently created my business page on Instagram and am studying information on how to buy real Instagram likes to increase the number of followers. I hope that I will succeed and that people will trust me and order my services.