Apple account recovery with a broken phone
I have broken my phone (touchscreen stopped working) and i also can't remember my icloud password. I have an ipad which is not currently signed in to the icloud, but has been previously/is associated with my icloud.
I have tried numerous account reset options but none of these have worked. I have got an old phone i am using with a new icloud.
When i do the account recovery, it is asking me for the passcode of the broken iphone - here is where it gets complicated - when i installed some apps i need for work i had to change my iphone passcode to higher security and one that therefore includes letters too. When the account recovery asks for my passcode for my iphone, it doesn't give me an option to enter a passcode with letters. So i was trying to remember the old passcode with letters and none of these work. I am completely stuck - any ideas?
My phone is under warranty with o2 but i cannot send it for repair as i can't disconnect the icloud from it, as i need the password.
I have been through the account recovery process twice and have not received the text with instructions. I have waited two weeks for each of these texts to come so have been without a proper phone for a month now.
iPhone 12