Hi Emre,
I can understand your frustration and I'm confident we'll be able to find a solution
As you might imagine you're not the only student to have taken the course. However, so far you're the first to encounter this particular problem.
I haven't seen your entire notebook, but from the pictures it does look very much like there is a different ordering of your segments.
There are numerous reasons as to why this might have happened. For instance, it could be because of a naming discrepancy in the first part of the course.
Please do not change the csv files and use the purchase data set we've provided from this lecture:
https://learn.365datascience.com/courses/customer-analytics-in-python/getting-to-know-the-purchase-dataset
In addition you can use the k_means_pca, pca and scaler pickle objects, we've provided in this lecture:
https://learn.365datascience.com/courses/customer-analytics-in-python/applying-the-segmentation-model
And lastly you can run either of the two notebooks here:
https://learn.365datascience.com/courses/customer-analytics-in-python/own-and-cross-price-elasticity-by-segment-assignment
As I have downloaded those exact files and run them, I can assure you they result in the same graph as in the video.
Hope this helps!

Best,
Eli

The 365 Customer Analytics in Python