Otherwise, how do I connect the account registered via email address and this one via Telegram?
I haven't found such an option anywhere, and I would rather have one account (one deposit address) than two.
I don't think that's possible (at the moment). However, I have the same problem as you and have also registered twice and therefore asked the support bot for an answer. As soon as I have feedback on this, I can of course share it here in the thread, which will certainly also affect other users in the future.
It doesn't stop me, but of course it would still be very nice if you could merge accounts in the future.