Fix Telegram Sign-In Error

I already have a telegram account and I am trying to login in to my telegram account via my IPHONE. At login screen it asks for my phone number which I enter. Then it asks for an email id. I enter the email id (a hotmail id) and proceed... (Budget: ₹600 - ₹1500 INR, Jobs: iPhone, Mobile App Development, Technical Support, Telegram API, Troubleshooting, User Experience Research)