This is the number for Customer Services Management: 0300 1050850
In my experience, very understanding and helpful, and super professional!
Call bang on 8am and you shouldn’t have to wait longer than half an hour, usually a lot less. I’m not sure they realise there’s a direct number out here doing the rounds so when they say “we understand you’ve been put through so you may have to repeat yourself” just nod and smile 🙂