Manage Multiple Numbers in My3

[MazdaD]

Hi

I called 3 and asked them how I can manage my 5 contracts in one place  they told me My3 I have created an account but am unable to add my other Numbers, on line help told me I would need a email per number this dosent work either, please can you help as I do not want to have to leave 3 due to not being able to do this.??

Thanks