Trai — mobile number blocked

Address:

New Delhi, Delhi, 110077

Hello sir
My idea number is permanently blocked for further use after i got this message "dear customer, kindly be informed that we have received a complaint against your number for sending unsolicited call/sms to dnd registered customers, so, as per the trai guidelines, we are processing disconnection of your number".
Sir, i need this number because we are just an initial start-up company only started doing work form 28/sep/2018. The number is already in circulation, & we don't have enough funds to do all this again.
Kindly tell us the procedure to get my mobile number back.
Thankyou