Just followed this articles suggestion and wao. That was easy, have not expected it is so easy. Is there a way to check if my telegram profile was really delete?

It actually worked

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Number of Total Worldwide Registered Domains

AUDIO Generic Top-Level Domain 6,2K
BABY Generic Top-Level Domain 2,4K
FAITH Generic Top-Level Domain 65,3K
FUN Generic Top-Level Domain 364,7K
GARDEN Generic Top-Level Domain 3,3K
GOLD Generic Top-Level Domain 13,1K
LAWYER Generic Top-Level Domain 11,1K
NYC Generic Top-Level Domain 58,9K
SALE Generic Top-Level Domain 31,0K
TENNIS Generic Top-Level Domain 1,7K
VIP Generic Top-Level Domain 1,095,4K
WEBSITE Generic Top-Level Domain 514,8K