If you transferred more than your investment amount (e.g. $250 rather than $249.50) to Birchal, your over-payment (e.g. 50c) will be deposited into your Birchal Wallet. You can then either allocate these funds to your next investment or withdraw the funds to your bank account.
If you have any issues withdrawing funds from your Birchal Wallet, please contact [email protected].