From Longman Dictionary of Contemporary Englishingratitudein‧grat‧i‧tude /ɪnˈɡrætɪtjuːd $ -tuːd/ noun [uncountable] THANKthe quality of not being grateful I’ve never seen such ingratitude!
Examples from the Corpus
ingratitude• They were shocked by her ingratitude -- she didn't seem to appreciate the trouble they had gone to.• He regularly accuses his children of ingratitude and selfishness.• Such ingratitude! After all I've done for him, he treats me like dirt. 