I lost my ex-company cellphone within notice period and did not report immediately. I had hoped that I misplaced, and that I will eventually find it and that is the reason why I did not report. I have attempted to report it missing to police station but I was advised that I need IMEI, ITC and Contract numbers however when i requested this from ex-line manager, he responded " unfortunately it's a business account and its not in my name. I don't have the authority to do that, if the phone got lost, the right thing to do was to report it lost to me or Edwin". Their lawyers wrote me a letter on the 20 August 2019 saying, if I don't return the phone by 28 August 2019, they will consider it as theft and contact local law enforcement without further notice.
What should I do ?