URGENT - Transferring clientele from old website to new website

[VERTICE]

To Whom It May Concern, 

Website: www.verticelondon.com 

I would like to know how I can transfer the old clientele data (email, address, contact...shopping history etc...) from the old account to the new account. 

I have updated the old account with new password, but cannot log in. 

Please advice. 

Regards, 

Mel