I have been with the same driving instructor for 3 years, I have taken my test 3 times and I have failed. After failing the first time, my family said that I should probably try a different driving instructor, as my current instructor does not have a great success rate.
Skip forward, the end of my third test with this instructor, and I have failed again. Each time I have failed on something where I haven't known something or have been nervous because I don't know where I am. All very obvious things. My friends and colleagues have all said that their driving instructors took them over the test routes, however my driving instructor has still not done this with me. During this time between the first test and the third test I have lost a lot of confidence in my driving, and I am now very nervous while driving, and my driving instructor has not been very helpful with this.
He has encouraged me to book my test with him again at the end of this month, however I have had a recommendation from a family friend who started their lessons with my driving instructor but eventually passed their test with a different driving instructor, who has suggested that I take my test with the driving instructor that they passed with. This driving instructor is available on the day I wish to take my test, and also has lessons available at a time I can do them.
It's also worth mentioning that my first two years of driving lessons were done in a car like the one this second driving instructor uses, but my last few months of lessons (a few weeks before my first test and during my tests) were done in a much larger car. I would use this as my excuse except that I am worried that my driving instructor will think that this is a bad reason, as I should be able to drive cars of different sizes. I have also purchased my own car, a smaller car, and have been practicing in this car and I have been driving just fine in that (other than stalling it a few times as I am not used to it).
After taking all of these things into account I have decided that I would like to change driving instructors. However, I have been working with this instructor for a very long time. They also live quite close to me so I feel uncomfortable. Right now they are asking me when I want my next lesson to be. I don't know if they have any cancellation fees for taking tests as they have no website, so I would need to ask them this.
How can I approach telling them that I don't want to do my next test with them? We tend to talk over text.
edit: Update I sent him this:
Hi name, I'm sorry but I think I'm going to try a different driving instructor, I feel like I'm not really getting anywhere and I need to try something different. Thank you for your time so far.
based on a few of your answers, and he responded saying that he didn't understand why I was changing instructors so close to the test, and blamed me failing the test on my own mistakes. I have decided not to reply. Thank you all for your help.