Ok. If you do not pay the for the damage to the carpets, the landlord may sue you to recover his/her expenses. As there was no pre-existing damage noted on the move-in inspection, and the damage was more than normal wear and tear (particularly for the LR), then you would likely be held responsible for the costs by the court. If you refuse to pay for the damage to the home, the court may also hold you responsible for some or all of the attorney's fees and court costs.
As an alternative, you may contact the landlord and the parent company by certified letter and suggest mediation. You cannot go directly to the mediator, as both parties must consent this process.
Let me know if you would like more information.