From Longman Dictionary of Contemporary Englishrenege on an agreement/deal/promise etcrenege on an agreement/deal/promise etcPROMISEto not do something you have promised or agreed to do SYN go back on They reneged on a pledge to release the hostages. → renege
Examples from the Corpus
renege on an agreement/deal/promise etc• They had been bitten too often by Congress reneging on agreements negotiated in good faith by the White House.• Amid an increasingly hostile war of words, Finley has criticized Racicot for reneging on a promise to cooperate with federal authorities. 