The app stores are going after and banning alot of pages, look down below for how to avoid it, these apps are self updating and will prevent you from being locked out from any blocked Telegram pages.
For Android:
Delete Telegram and re-download the app here:
https://telegram.org/androidFor IOS:
It's a web version, you can save a shortcut to the webpage directly where the rest of your apps are
https://webz.telegram.org/