Dear O2 Customer Service,
I initially entered into a O2 M Flex DSL contract on 23rd November 2022, with the understanding that I could cancel it at any time, providing the desired flexibility. Then I applied to transfer my contract to my new residence within Germany from the start of August 2023. The Flex contract remained in effect until 22nd August, even after I relocated to a new address, adhering to the terms and conditions.
However, to my surprise, for the month of September, the contract was automatically changed to a 24-month contract (this is what the customer service agent told me) without my explicit consent. This change was contrary to our agreement and was made one month after my relocation to a new address, violating the terms we initially agreed upon. I didn’t receive any email or letter by post informing me about this. I got aware of this when I received the invoice for the month of Sep 2023.
Notably, the monthly charges remained the same at €34.99, even though my contract was unilaterally altered without my consent. This discrepancy is concerning, as I had specifically opted for the Flex contract due to its flexibility and the possibility of cancellation at any time.
Now I want to cancel the contract as I no longer intend to use it and I request that this cancellation is processed as soon as possible to avoid any further inconvenience. I have already sent a written letter to O2 explaining to them the situation but I received a letter stating it could only be canceled in Aug 2025. The thing is I no longer want to use the internet and would prefer the advantages of the original FLEX contract which could terminated in an ad hoc basis.
I would appreciate your prompt attention to this matter. If you require any additional information or documentation to facilitate the cancellation process, please do not hesitate to contact me.
Thank you for your assistance and understanding.
If you haven't received it yet, please be patient. 
