Lucent Lightshop review for Fulfillment Estimates

This app's link and function suddenly disappeared from our app section and is not working in our store. The SSL has also expired, so it may be that they are out of compliance with Shopify? I've emailed 3 times, and no one has responded. It worked beautifully before, but no one is bothering to get back to us to let us know what happened, and we're still being charged. I'll be happy to change this review if someone can help us.