They took the unilateral decision to cancel the contract.

他们单方面决定撤消合同。

youdao

We want to cancel the contract because of your delay in delivery.

由于贵方交货拖延，我方要求取消合同。

youdao

But if you don't cooperate, we shall have to cancel the contract.

但是如果你们不合作，我们不只好取消合同。

youdao

Although the research concluded that complaints of energy mis-selling were on the wane, 25% of consumers who signed as a result of the contact went on to cancel the contract.

BBC: Energy firms still 'duping' consumers

The Scarlets are also expected to cancel the contract of Kiwi open-side Daniel Braid after he ruptured his Achilles tendon last weekend, having only just announced his signing for next season from Queensland Reds.

BBC: James aims to carry on playing

After receiving a single scan, Ms. Moritz tried to cancel the contract, but the medical provider said it "had already been paid in full by CareCredit" and couldn't reverse the charge, according to court records filed in U.S. District Court in Chicago.

WSJ: Is Your Doctor Pushing Credit Cards?