put https://gateway.pmnts-sandbox.io/v1.0/payment_plans/
A Payment Plan's status can only be updated to Cancelled, Suspended or Active. For a suspended plan it is possible to set a date the plan is suspended until.
When a plan is suspended, any pending payments will be removed. If the plan is resumed, the pending payments will be re-created to meet the plan's constraints.
Note:
Payment plan must be active for any other attributes to be updated.