As to your question: kung makukulong ka?
Meron possibility because as per your narration you employed deceit “naisipan ko na ipangalan ang orders ng isang bagong customer namin sa mga luma na in-actives na.” Without this wrongful act of yours, your company would have not contracted with the new customer.
Though it might appear that you did not benefit from the transaction since you did not receive the goods, your employment of this scheme still benefited you indirectly. In a way, you were able to achieve a certain employment status.
The essence of the crime of estafa is damage. From your narration, when you were not able to collect, the element of damage is now present. Your company losses what it has delivered to a third person whom you represented to be old customers. Hence, a criminal action for estafa may be commenced against you. In the event of conviction, you might suffer imprisonment.
However, if you will be able to convince your company that you acted in good faith, they might not pursue criminal action. Instead, they might decide to commence civil action for damages. Kung civil action lang, hindi ka makukulong.
As to your question: kung mapipilit ka bayaran?
Whether civil action or criminal action, you will be required to pay.
Being a principal by indispensable participation, part of criminal liability is the civil liability to compensate for the damage. Thus, your company might force you to pay legally by commencing criminal action against you.
As to your last question: Ano po ang pwede ko na gawin para ma settle ito na hindi ako mapepressure na bayaran ito in full?
I absolutely agree with JaneDone, try to compromise. You will also have a chance to mediation proceedings.
In the meantime, your best action is to try to collect from the new customer and to convince your company you acted in good faith by paying for the damage you have caused them.
Also, try to seek the services of a lawyer, since anything you say or do may be used against you.