Keeping same number from old O2 contract

[Ka4]

My mom took out a contact for me when I was younger but since I was 18 I have paid they contact via my personal bank accounts direct debit. 
I was told to change the name on the account I needed to end the contract and take a new one out (or she had to do something but she now lives abroad so it’s hard) 

I finished the contract December, fully paid and took out a brand new contract and phone in my name. 
I just want to keep the old number from the old contract but transfer it to the new contract. I’ve called and spent hours on the phone, my mom has provided a ownership password so it can be transferred but it hasn’t. 
ive cancelled the old contract so worried the number will disappear? 

[jonsie]

Are you able to assist @O2Lisa or @O2Georgina ?

[O2Lisa]

Thanks for the tag @jonsie, @Ka4 I'll message you privately and look in to this for you😊

[jonsie]

Thanks Lisa

@Ka4look for an evelope with the figure 1 at the top right of the page