Welcome to the community. Sorry to hear you're having difficulty sending text messages from Hong Kong to England.
I'm not 100% sure why the call cost is £2 a minute but I suspect it has something to do with the agreement between us and the foreign networks.
I've checked Hong Kong on our costs and coverage page and it shows text messages are available for all 6 networks. Which network are you connected to?
If you're still having trouble then I'd suggest trying to manual connect to a different network and testing it again. Has this resolved the problem?
Look forward to your reply.