BSNL — sim card block request

Address:

A-4199,Refinery township,panipat, Panipat, Haryana, 132140

My sim card is lost on 08/12/2019 at about 12am near isbt. Please block my sim card so unotherise use. L have tried many times customer care but no response. My contact no is [protected]. And my ulternate contact no for communication is [protected]. My contact no is linked with all the apps and bank also (With sbi and state bank of baroda) so please block my sim card immidiately because of sequerty resones. I have filled also and attached the copy with this complaint also.