Checkout.com Senior Manager interview questions

Scheduled an initial slot with the 'senior' interviewer for the role to have the initial conversation. I got in touch with sufficient notice to ask to reschedule and was told that was no problem. I shared some alternative slots which by the time they'd responded to me had then passed, so I shared some new slots and received no response. I have followed up twice since and have heard absolutely nothing back ever since, no email to advise the role has been filled or I will no longer be considered just pure silence. Terrible candidate experience, reflects so poorly on the organisation!