PlayStation®Network Support

[supcat16]

I entered a $20 PSN code on my PSVita, and the balance is correctly updated on my playstation store when I access it from my PSVita. When I went to buy something on my Playstation 3 the balance wasn't correctly updated and I could not find a refresh balance option of any kind. When I tried to purchase an item it said I had insufficient funds, so I hit redeem code and rentered the code I had used on my PSVita into my PS3 but it said the code had already been used. My balance still wasn't updated and I cannot purchase the item I had wished to purchase.

How do I update the balance on my PS3 to match the balance it shows on my PSVita?