No SMM panel can offer you 100% non-drop service, even if we didn't face drops before. First of all because of updates in algorithms of social networks. That’s why we advise our partners to use guaranteed service, as we will refill these orders in case of drops.
Please check this article to learn more about the reasons for drops.
The best way to know relevant credible services is to contact our support via live-chat on viewsta.com.