transferring a paid account which will be closed down

Hi

I have to accounts

1) free account on my personal address
2) paid subscription on a corporate address which I had for a contractor assignment

The assignment is finished, so the email address will be terminated.
How do I get the paid subscription transferred to my personal email address? Changing the address in the paid subscription to my personal address doesn't work: I get a message that there's already an account on that address (which is correct)

Adding the private email to the paid account ain't the solution, as I wont have access to the email address associated with the paid account.

looking forward to your response

rgds

Charlie