To close your Gymcatch account please login at portal.gymcatch.com > go to the Plan and bolt-ons page from the left hand side menu > click Cancel plan > follow this automated process through to completion where the last step is clicking the I understand, please cancel my account button.
Please note that the actioning of cancellation requests can occur at any time after they are submitted, so you should assume your account can no longer be accessed from that time.