swiftic Como DIY Refused to provide us with the signing key for our Android app, making it impossible to leave their service without abandoning our existing users Internet

Swiftic provides a service where you can build your own mobile app. They promise to handle app store submissions for you to both Apple's App store and Google Play store. However, if you ever want to leave their service to build the app yourself (as our company has done) they will refuse to provide you with the signing key to your Google Play app. This means you can either stay with their service, or you can abandon all of your existing users.

We asked them for our signing key multiple times. They tried to tell us that it wasn't possible to provide it. When we explained step by step how to export our signing key from their keystore, they continued to deny that this was possible. They refuse to even admit that they are simply unwilling to export the key, claiming that it is not possible. It is possible. Other developers do this all the time.