I am Vinod. I will try my best to help you resolve this issue.
Unfortunately, there is no direct way to transfer money from one itunes account to another. If someone could do that for you, it could only be itunes store after verifying your credentials. So you will need to contact the itunes store. You may either call 1-800-2752273 between 8am and 8pm CST.
Or you can write to them. Go to the following website from your computer
Click on "itunes and apple music". Then click on "itunes store". Then select "purchases, billing and redemption". Then select "itunes store account billing" and then choose the chat, email or talk option.
Hope this helps. Let me know if you find any difficulty.