about shipping warning

Czech Republic belongs to Europe. From June 2021, if we ship your products to European countries via DHL, you will have to pay tax or customs duty. We can't write a low value so we don't know how much you will have to pay customs. And since the type of product is a lens, customs may ask you for a prescription.
We want to know your opinion. Can we give you a refund? Or can we ship by DHL?