Unfair penalty fee after a cancellation done a month in advance.

I am writing to express my deep disappointment and frustration with the handling of my contract cancellation. Despite submitting my cancellation request on March 13, 2025, I have been subjected to unfair treatment and a lack of transparency. The car broke down on March 14 and remained in the workshop until March 27, 2025. I fetched the car and then I followed up on April 4, 2025, regarding the cancellation, but received no confirmation or feedback. I was subsequently informed that a penalty had been incurred, which I paid on April 14, 2025. (Don’t have a problem with it) So why do I have to pay another penalty when I have cancelled in March already) I am now being told that I owe an additional penalty fee, despite having returned the car and not using it for the entire month. This is unacceptable, especially considering I haven't received a settlement letter. Being asked to pay twice for the same penalty is unfair and unreasonable. I have been diligent in following up on my cancellation and even requested a waiver at one point, but my requests have been met with silence. I urge you to review my case and provide a fair resolution. It has been a difficult journey with this company and i would never recommend it to anyone. They are *********** people and their staff is ***********. I would like to know:

- Why I haven't received a settlement letter despite returning the car and paying the penalty. - How I can be expected to pay an additional penalty fee when I haven't used the car for the entire month.