Lack of dispute resolution urgency

I entered into a contract with ADT Secure Drive, verbally through telephonic sale, to install two trackers. During the sale, the rep outlined the terms and conditions of the contract which I agreed to.

A few months went by and I was no longer in need of the tracking devices. I called to cancel and moved on. A few months after that, to date, I have been receiving endless calls that I owe cancellation fees.

For all the 10+ calls I have received so far, I have explained to all of them that I do not remember being told by the salesperson through the phone sales that there is a cancellation fee.

I have asked on countless occasions that the call (that we are normally told may be made available upon request) record be extracted to confirm the details and conditions of the contract as I had indicated that I do mot remember this condition mentioned to me.

Instead am still receiving calls, and not the call recording as requested, about the cancellation fee and also threatened that I will be blacklisted.

All I ever ask is for the call record to be made available, to confirm if this condition was relayed to me and agreed to by myself, and find closure to the issue.