Utility pedestal

There's a utility pedestal in my building - the contract expired and I was NOT paid for the full fourth quarter of 2025. The pedestal is still  using my house electricity and the bill is almost 8x higher than normal. I started leaving messages with the 'procurement to pay dept' on 12/11 and have yet I hear from them. I know that if I turn off the circuits at the breaker there will be no Internet service in that AREA. at this point since the contract has expired and Xfinity is NOT returning any my messages, I'm going to turn off the circuits and refuse entry to the technician.