On part of the date I gave her access to my staff discount on a very expensive tech product and got it delivered to me.

So after all this I text her about meeting again and she read it and ghosted me for 24 hours which hurt. I messaged her today asking if everything was okay, and sent her a picture of the now delivered product. She didn’t answer that question, answered the other things I said. But instantly apologised and said her message hadn’t sent.

We’ve now agreed another date. But I can’t help but feel that she’s now just using me for this product saving. I could very well be projecting my own insecurities onto the situation here

I think based on what on you wrote, it's not really being insecure to think that she is a bit using you. You seem really more on her that she is, so think about what is okay for you and what isnt