Aramex Couriers — Customs duty paid them is fake

Address:	Gurgaon, Haryana, 110037
Website:	www.aramex.com

Hi, my courier from US to India was delivered by Aramex...they claim that customs duty is Rs 6000+, which works out to 100% of value of goods ! the customs duty demand is printed on letter head of Aramex, with no mention of Customs Dept reference number...they are fake and charging in the name of Customs Dept...please resolve