You can report scammers and impersonators through this Telegram channel: @notoscam.

Also, if any scammer contacts you on Telegram, you can tap on "Report as Spam" at the top of the chat, or send an email to: abuse@telegram.org, including the scammer's username and any evidence you have to support your report.

What happened to you OP could happen to anyone. It's good that you warned and alerted the community about this matter so that they are not misled.

Any user who wants to contact you should be the one to initiate the conversation through one of the two official Telegram accounts you shared in the OP.

Everyone should know that you never DM first and this is the fundamental rule. Anyone trying to contact others while pretending to be you should be blocked immediately, as you do not start conversations . by following this rule, Impersonators will fail in deceiving others