No action being taken on Electricity Theft complaint by BSES

Sir/ Madam, I live in a residential builder floor on a notified commercial road. Some offices are being operated from our building without converting the user from residential to commercial. The aggrieved residents filed numerous complaints with DJB, MCD, DDA, etc. but no action has been taken by them. Recently we filed a few complaints with BSES against the Electricity Theft being done by these offices in the form of Unauthorised Use of Electricity. But, BSES officials have filed false and fabricated replies that their executive visited the property and found no such unauthorised use of electricity and disposed all the complaints as vexatious and frivolous. When the residents escalated the issue, we are being told that the sole authority on this issue lies with BSES and they have no intention of taking any action against the violators. What is a legal remedy against this? How can we stop these offices from stealing electricity and get them sealed.