The payPalUpdateAgreementService service cancels a billing agreement.
When you request payPalUpdateAgreementService, you must include the following fields in the request:
npayPalUpdateAgreementService_run
npayPalUpdateAgreementService_paypalBillingAgreementId
npayPalUpdateAgreementService_paypalBillingAgreementStatus
nmerchantID
nmerchantReferenceCode
Additional fields are optional. The required and optional fields are described in API Fields.