Hi,
1) You can always request support from us, but you need take in your mind that customization is not regular Template support.
2) Lets face the fact, this template is also too old to get full support according to our Rules.
3) About "circled heading" --> this whole table have "cart-summary" class - and whole this object you can safely edit here:
templates\gk_yourshop\html\com_virtuemart\cart\default_pricelist.php