We are very sorry that you feel this way about our our Jtag calendar plugin !
We do all our development on a Linux environment, and use Firefox as our primary browser. We test all our extensions on multiple browsers, including Chrome and IE. Jtag Calendar component works fine in Firefox, Chrome and IE. This has been tested and validated by many live users of the calendar on a variety of browsers and Joomla templates.
We usually try our best to get the component working with your custom templates but if our support is unable to get the component fully working with your custom template, we are more than happy to offer a full refund of your purchase. (as per our refund policy)
We apologize once again for not being able to get the calendar plugin working to your satisfaction on your custom template on Chrome. We have initiated a full refund of your payment.
Wishing you all the best in designing your Joomla website.