We are sorry about the inconvenience. If you are unfortunately unable to meet the mobile phone requirements from your country, please use this link to request more permissions for your application: https://support.twitter.com/forms/platform, and use the option "I have an API policy question not covered by these points". The Platform Operations team at Twitter will help you in the process.
We are aware of the current difficulties in some countries and actively working on improving the app registration and update flow. Thanks for your patience.