Foreword: Having two accounts is against the T&Cs, some caution advisable. You should only use one of them for playing.
Two ways to shift the payment IMHO:
- Let John gift items to John1 from time to time - possible for most things except when tiered above Pro.
- Apply to WGT ("contact" link below) and ask them to transfer the credits.
Reminder: You ask here, you get answers here.