Iv recently taken out a 30 day sim only contract for my sons phone (£8 per month)

today I tried to order myself a new contact and iv received an email to say the order has been cancelled as I need minimum 90 days payment history on my sons sim only contract

is there any way around this as I need a new phone asap?

if I cancel my sons sim only contract will I be able to take out a phone contract for myself straight away? 

Or If take out a contract in my mother’s name and bank account can I swap the direct debit to come out of my bank account?