Bharat Sanchar Nigam [BSNL] — my phone no: [protected] stops working all of sudden and assign to someone as confirmed from bsnl office

Address:

Village Post Mittupur, Block Jahanaganj Tehsil Sadar, Azamgarh, Uttar Pradesh, 276131

Dear sir

My name is nishant kumar rai. My bsnl: [protected] is this and al of sudden this phone no. Is not working and coming switched off. And when i went to know the details of sim no.: [protected] but officer told me this phone number is allotted to mr. Jaharuddin, hazipur district, bihar.
So kindly request you to please confim me how my personal number can be assign to someone. 4-5 days ago this phone no: [protected] was working and all of sudden assigned to someone. How could this happen? Below is the registered docket no./complaint number

Grievance registered; docket number is : upe/co/2019/6070

Kindly resolve this issue and provide
Me my same sim number.

With regards
Nishant kumar rai