Urgent: Disputed Service Cancellation and Billing Issue

I am writing to express my frustration regarding my service cancellation. I called on April 14, 2026, to request the cancellation effective April 15. However, when my friend attempted to return the modem on April 16, the store staff claimed the account was still active.

This has caused me significant inconvenience, as my friend made a special trip that resulted in a wasted effort. Furthermore, I want to make it clear that I refuse to be charged for any days after April 15, as the delay was due to your company's failure to process my request.

Please confirm immediately that my service has been terminated and ensure that no additional fees will be applied to my final bill.