Unfair treatment and bullying

I am writing to formally raise my concerns regarding the rental agreement I entered into in June 2024. At the time of signing, I was verbally assured that I could cancel the contract at any time should the need arise. Unfortunately, around September 2024, I experienced severe personal and financial difficulties that impacted my ability to meet my monthly debit order obligations. When I received a statement in January 2025 reflecting arrears, I immediately made payment arrangements, which I have consistently honoured. I also requested that the services be temporarily suspended until my financial situation stabilised. However, this request was declined, and I was instead threatened with legal action. In July 2025, my account was debited twice the usual amount. When I queried this, I was informed via email that a refund would be processed. To date, no refund has been received. Upon following up and expressing my intention to cancel the services due to the breakdown of trust and the poor treatment I’ve received, I was informed that cancellation is not permitted as I signed a 36-month contract, and that I would remain liable for the full term if I choose to terminate. I find this response unacceptable and feel that I am being unfairly treated. I no longer wish to continue with a service that has caused me significant distress and failed to act in good faith. I believe I should not be forced to continue paying for a service I no longer need, particularly under these circumstances. Please help me.