Displeasure Regarding Unauthorized Charges for International Roaming

I am writing to express my deep disappointment and frustration with the recent billing issue I have encountered with AT&T. As an AT&T customer, I have always trusted the quality of services provided by your company. However, I find myself facing an incredibly alarming situation that necessitates immediate attention and resolution.

I want to make it absolutely clear that I did not use international roaming services during my recent trip to Japan. In fact, when I received a notification from AT&T regarding international roaming, I explicitly declined and rejected any offers related to it. I made a conscious decision to refuse any cost-incurring roaming plans, as they were not suitable for my needs. It is therefore absurd and deceptive for AT&T to claim that I refused their "cost-effective" international roaming service while still charging me exorbitant fees. If I had used international roaming, it would have cost me a mere $10. Yet, AT&T persists in its preposterous and fraudulent assertion.

I am deeply disturbed by AT&T's complete lack of understanding and refusal to acknowledge the factual circumstances. I have clearly explained that I did not use international roaming while in Japan, yet AT&T dismisses my explanations without any attempt to comprehend the situation. This level of disregard for customer concerns is both outrageous and unacceptable.

I demand an immediate investigation into this matter and a swift resolution. It is imperative that AT&T recognizes the error in its claims and refunds the unauthorized charges that have been applied to my account. The evidence I have attached, including my travel itinerary and a detailed record of my phone usage during the trip, unequivocally proves that I did not engage in any international roaming activity while in Japan. I trust that these documents will serve as undeniable proof of my innocence and prompt AT&T to rectify this issue without further delay.

Furthermore, I expect a comprehensive explanation from AT&T regarding the circumstances that led to this erroneous billing. It is essential that AT&T takes this matter seriously, conducts a thorough investigation, identifies the root cause of the problem, and implements measures to prevent such instances from recurring in the future. Customer trust and satisfaction should be paramount for AT&T, and this incident has severely shaken my confidence in the company.

I request a prompt response to this matter, acknowledging the gravity of the situation and outlining the steps being taken to address it. 
It is my hope that AT&T will demonstrate its commitment to customer satisfaction by swiftly resolving this matter and restoring my faith in your company.

Thank you for your immediate attention to this issue. I trust that AT&T will rectify this issue and provide a satisfactory resolution. I anticipate a prompt response.