I am writing to formally request the cancellation of my NOS service, effective as soon as possible.
I have already visited a NOS store, where I was informed that cancellation must be done by phone. However, I have been trying to contact your customer service for the past three days without success. My calls are not being answered, and on the occasions when I receive a call back, it gets disconnected when I answer.
This situation is extremely frustrating and unacceptable. Additionally, I have noticed that there is no toll-free customer service number, and I am being charged high amounts simply for trying to resolve this issue. It feels unfair that I must pay to address a problem caused by poor service.
I would also like to highlight the inconsistency in your service: when I subscribed, everything was handled quickly and efficiently at the store. However, now that I wish to cancel, there appears to be no proper support available.
Please proceed with the cancellation of my service immediately and confirm in writing once it has been completed. If any further information is required, please let me know promptly.
I expect a quick resolution to this matter.

