Have spent the last three weeks simply trying to c...

Have spent the last three weeks simply trying to change my bank details for them to collect payments from. Won't let me do it on the website, won't let me log in to the app, no one answers the phone and emails bounce back saying they have no record of my email address despite them emailing me on it numerous times. I guess they'll contact me once the next payment doesn't go through! Shambles.