OP, you’re not taking on board what people are saying to you, or answering the pertinent questions.
Personally, I think you sound nuts.
My take on it - this woman, who you didn’t know, who was just a friend of a friend, very kindly offered to show you around her town in Australia.
In spending time together, by your own admission, it became apparent that you had nothing in common and did not get on very well together.
To her credit, she stuck to her word and showed you around, although by now acting like a tour guide, which you didn’t like.
Upon return to the UK, despite the fact you didn’t really like her, you have tried to turn this into a friendship by keeping in touch.
She initially replied but has now stopped.
As others keep asking - why do you care?
Bluntly OP, I think this woman made a kind offer and then regretted it as she didn’t really like you. To her credit, she continued to show you around, “like a tour guide”.
I’d imagine she just wants to leave it there OP, just let it lie.
And calling her a “crap friend” - wtf?? She’s not a friend! She’s a friend of a friend and it sounds like she really went above and beyond, and you dont even appreciate it.