Hooking BACS Info Into PDF Invoice

I tried to add in the bank details to my PDF invoice. However, when I add in the PDFBANKDETAILS to my template.php, nothing comes out.

My BACS is populated with all the information required. Can anyone help?

/**
 * Add Bank Details to footer from WooCommerce BACS settings
 *
 * Uses template tag PDFBANKDETAILS
 *
 * 1 - Add the template tag to template.php
 * 2 - Add this code to the theme functions.php
 * 3 - check invoice layout and modify CSS in template.php as necessary
 */
add_filter ( 'pdf_content_additional_content' , 'pdf_additional_content_bank_details_footer' );
function pdf_additional_content_bank_details_footer( $content ) {

	$woocommerce_bacs_settings = get_option( 'woocommerce_bacs_settings' );

	$pdfbankdetails = '';

	if( $woocommerce_bacs_settings['account_name'] ) :
		$pdfbankdetails.= 'Account Name :' .$woocommerce_bacs_settings['account_name']. ' ';
	endif;
	if( $woocommerce_bacs_settings['account_number'] ) :
		$pdfbankdetails.= 'Account Number :' .$woocommerce_bacs_settings['account_number']. ' ';
	endif;
	if( $woocommerce_bacs_settings['sort_code'] ) :
		$pdfbankdetails.= 'Sort Code :' .$woocommerce_bacs_settings['sort_code']. ' ';
	endif;
	if( $woocommerce_bacs_settings['bank_name'] ) :
		$pdfbankdetails.= '<br />Bank Name :' .$woocommerce_bacs_settings['bank_name']. ' ';
	endif;
	if( $woocommerce_bacs_settings['iban'] ) :
		$pdfbankdetails.= 'IBAN : ' .$woocommerce_bacs_settings['iban']. ' ';
	endif;
	if( $woocommerce_bacs_settings['bic'] ) :
		$pdfbankdetails.= 'BIC : ' .$woocommerce_bacs_settings['bic'];
	endif;

	$content = str_replace( 'PDFBANKDETAILS', $pdfbankdetails, $content );
    return $content;

}