Is BitPay hacked?
Probably not, but I still have no information what has happened with my payment. It is not less money. Around .3 BTC.
Does anyone know whether the address 36Lh3Ktiu5Xw6ZXJAqYZXXGMs1T3PyG5Ky belongs to Bitpay or not?
You might have to contact the shop rather than bitpay. The bitpay website seems to pass the buck to the merchant for refunds.
https://bitpay.com/pay-with-bitcoin
BitPay provides tools and reporting for merchants to view successful payments and manage their own refunds in bitcoin. If you would like a refund or need help in getting your order for a successful payment, please contact the merchant directly. They can initiate the refund process or help you get your purchase.
Remember that you will need to provide your BitPay invoice URL or your order ID for the merchant to assist you. Merchant refund policies differ, so please contact the merchant to discuss refund options.
There's also this blog post about it.
https://blog.bitpay.com/transaction-delays/