Steve Charlish from the DEMAND Campaign called for the company to make it clearer on how to give feedback.
He said: "It is vital the different ways in which people can complain to the airport are made public and as easy as possible to use.
"But
the website appears to have been redesigned to discourage complaints.
"The only 'obvious' method electronically is to use the online 'your feedback' form."
He also complained that the number to call was not free.
An airport spokesman said: "We welcome any practical suggestions which will make the complaints procedure more accessible.
However, the airport website is only one of a number of ways complaints can be registered - via e-mail to: environment@eastmidlandsairport.com, by letter, by a local rate telephone number: 08450108 8540 or by fax on: 01332 853202. Last month, the vast majority of complaints were received via email and letter."
DEMAND has called for a limit on night flights to the airport which it says disturb people's sleep.
It has set up a petition to the Government which can be signed at www.demand.uk.net