Not willing to pay for a course Hi please tell me if i'm wrong here, I started a course a few years ago, may be 2.

It was an accountancy course, the ACCA. I left the course after 3 lessons out of 10 as the tutor who was supposed to do the course left on maternity leave and was replaced with a foreign (European) tutor who spoke broken English and all she did was try to make small talk jokes. Now I left the course and explained that this wasn't something that I signed up for and now they want £2300 of me. but I'm refusing to pay. Am I right or wrong and if someone can point me in the correct direction on how to proceed.
This seems less like an academic question than a question of contract law.  Nevertheless, for what it's worth, if you are refusing to pay the amount claimed, then presumably the onus will be on the education-provider to sue you for the money, and establish in court that it is a valid debt.  You will have an opportunity to argue that they failed to provide you with the contracted service and that the substituted service was sub-standard.  Whether or not you have a good case will depend on the details of the matter, the specifics of your agreement with the provider, and the commercial laws of the jurisdiction in which this occurred.

If necessary and affordable, you should seek legal advice (from real commercial lawyers - not random guys on academia.SE).