I think my telegram account has been hacked. Though I do not tell to send dollar to any wallet yet scammer may ask to send. Please no one send any payment on telegram. If anyone make any transaction via telegram I will not take liability for that.
You should also write this in your lending thread, and even mark it in red as an important message. I think that it is more important to publish there than here so that your customers are informed.
As @dkbit98 said, if you haven't enabled Two-Step Verification, do so now. Just go to >Settings, then > Privacy & Security, and you will find this option. In addition to 2FA and Active sessions, you can click on Connected Websites and disconnect any websites linked to your account.
Here he can only create a password, but if his Telegram is hacked, the device he uses is probably also compromised, which means that activating the password now will not be a guarantee that he has protected the account