Answer:
The customer should use the:
Non-binding arbitration
Explanation:
This non-binding arbitration will enable the two disputing parties to be advised on the best possible solution to their disagreement. However, since the arbitration is non-binding and merely advisory, the two parties are not bound by the decisions of the arbitrator unless they each agree to abide with the settlement. On the other hand, if the arbitration is binding, then the decision of the arbitrator is final.