How do I get electrical service.

While I am not certain of the precise answer to your question, I would contact the electrical service provider and advise them of the situation.  I would also notify the landlord, and expecting that the electrical service provider will require payment in full of the outstanding balance, I would advise the landlord of this fact and that you will pay the balance due on the electrical bill and deducted from ongoing rent so that you can have electrical service and operate your business.  Short of that, the landlord has provided you with an uninhabitable premises, thereby breaching your lease, and entitling you to walk away from the transaction and demand a full and complete refund of any and all monies you have paid.