From Longman Dictionary of Contemporary Englishunrewardedun‧re‧ward‧ed /ˌʌnrɪˈwɔːdɪd◂ $ -ˈwɔːr-/ adjective not achieving what you want to achieve His efforts have not gone unrewarded.
Examples from the Corpus
unrewarded• The frustration of unrewarded effort reinforces other creeping changes.• Many nurses in small community hospitals have been working as ENPs, unrecognised and unrewarded, for many years.• Meanwhile the Emperor ordered that Aurangzeb should remain - unrewarded - on gruelling campaign against the empire's enemies in the Deccan. 