An unacceptable waiting time to speak to someone. I only wanted to add a mobile phone number to my details when downloading and registering the App as whenever I purchase something with my credit card of longstanding, the security check goes to my landline. The app told me to phone you. I spoke to a very polite lady, answered a mass of security questions but was then told that this was not sufficient security! I now have to wait 5-7 days for a letter and then go through this whole process again. I’m pleased to know how careful you are being, but I find this just a bit too much and extremely frustrating.