Just E mail them or through registered post that you have disconnected the meter by paying due bill and nothing has left to recover. And on same date it was requested your employees to uninstall the meter and take away by giving due receipt. And many reminders send so far for this.
For any wear and tear and damage, you will not be responsible and take the meter forthwith.
Can electricity company file suit after 3 year due payment, last payment 3years ago --- NO