Unable to cancel

I am extremely frustrated with Adobe's terrible customer service. I accidentally subscribed after my free trial ended and have been trying to cancel since October 1, but your system keeps blocking cancellation because of a failed payment. It is now October 13, and nobody has provided a real solution. I am a student who genuinely cannot afford this subscription. It is unacceptable to make signing up so easy while making cancellation such a nightmare. Please stop sending me the same instructions and manually cancel my subscription. I need a solution, not another runaround.