At the end of the day, we don't believe that Ingramer is safe to use. While there are a number of features they've covered on their website, there are also many others that they have failed to include, which we can only put as strikes against them.
Apart from the fact that they are selling you fake engagement and don't have any form of customer service set up to help you once you've paid, they're also selling an Instagram verification scam under the pretence that it's legitimate.
We think it's clear at this point that we don't think Like 4 Like is safe to use. Their ‘free' service is a strange concept because it's automated which means that they're using a bot, but not charging you for it – which is even more strange.