Error "Please contact itunes support to complete this transaction" when in-app purchases

Question

Dear Sirs,
As frequent customer buying iTunes Gift Card, I would appreciate your kind clarification on below points, for my best reference:
- I'm using Apple ID Canada and playing a game (i.e. Clash of Clans from http://www.supercell.net) which identifies each game account by their GameCenter account. Hence in case of using only this Apple ID, for how many account game I can buy in-app purchases?
http://itunes.apple.com/ca/app/clash-of-clans/id529479190?mt=8
- I use my Apple ID buy gem ( intem of this game ) for 2 anccout game ( 2 iDevices) , but now I can't buy more Error "Please contact itunes support to complete this transaction" .How I can fix it ?
For ex: My Apple ID is [email protected] and share to a friend. Both of us log to this Apple ID "[email protected]" to download a game on 02 different iDevices namely "acc1" and "acc2". Is it possible to use only this Apple ID to buy in-app purchases for both account games "acc1" and "acc2".
Looking forward to hearing from you soon.
Thanks and Regards,

Answer 1

noobdoon wrote:
... "Please contact itunes support to complete this transaction" .How I can fix it ?
Contact iTunes Customer Service
Apple  Support  iTunes Store  Contact Us
noobdoon wrote:
... Is it possible to use only this Apple ID to buy in-app purchases for both account games "acc1" and "acc2".
See Here   http://support.apple.com/kb/HE37
I have multiple Apple IDs. Is there a way for me to merge them into a single Apple ID?
Apple IDs cannot be merged. You should use your preferred Apple ID from now on, but you can still access your purchased items such as music, movies, or software using your other Apple IDs.