Top-up Fee is 4% by default. This is deducted from the paid invoice, the remaining 96% is topped up on your account. If you use Credit Card/Amex there is an additional 3% fee. In that case you will receive 93% of your top-up amount on your account.
Make sure you use the email address you provided to us
Send us the correct name of your ad account that you want the top-up on to make the process as smooth as possible.