Dear Sir,
I can help to redesign and refresh your Kentico ecommerce website.
I highly recommend you to switch your current site using Kentico into Shopify, the best e-commerce platform in the world and also famous in Australia.
With Shopify, you can integrate Zip Pay, AfterPay or Stripe as you want. About POS, Shopify does have POS included in the package.
If you're interested in this switching and migration, I can help to advise and complete it in about 3 weeks.
Kind Regards,
Tran