Tata Docomo — sim has been blocked

Address:

East Godavari, Andhra Pradesh

when i was trying to fix a password for my mobile in security settings i went to a option call pin code which then forwarded to PUK code and i even tried to make that using my own mobile number and later it displayed a message that "sim has bloced". i dont know why? My docomo mobile number is [protected](blocked number). my alternative number is [protected]. please solve my problem immediately, i don't even have a other docomo number to call to the customer care