How do I say 'excuse me'? So, I just found myself in a spot of bother. I decided to go to learn how to make some Chinese knots, but everything there was Chinese, so I had to speak Chinese. I understood the instructions that the teacher was telling me, etc. and it was all going well...

But then I realised that I had no idea how to ask for a random person's help.

In England, we usually say. "Excuse me", and then the thing that you need to say. I didn't know how to do it, sadly. So, I said 对不起, and then the sentence.

Was it wrong for me to have said 对不起?

How do they say 'excuse me' in China?
对不起 is not wrong. According to the scenario, it's fine if you intent to use it for the meaning of I'm sorry (for bothering or disturbing).

You can also use 不好意思 or 打扰一下 instead, if you won't bother the random people much.