You can terminate your contract with Yuso via My Yuso Services. Any monthly cancellable contract can be terminated with 1 month's notice, counted from the end of the month.
To do this, go to my.services.yuso.io and navigate to the company for which you want to terminate the contract.
Then go to the "Manage" tab and select "End your contract".
Next, you can select all the contracts you wish to terminate. You can set the end date of the contract yourself; a minimum notice period of 1 month is counted from the end of the month.
Click "Continue". A confirmation email will be sent to the company email address. The contract will be automatically terminated on the requested date.