Thabisa review for WebPlanex: GST Invoice India

We have been using this app @ Thabisa.shop the last few months and have moved away from manual invoicing. They seem to have a very good customer service as the support is very responsive. One area for helping us - is to somehow help us accommodate the ability to add new items to the invoice when when we add free gifts to our customers (not part of original order). Will recommend this app to other Indian ecommerce stores.