Virgin Media Broadband

WARNING - THIS DOES GO ON A BIT
In Dec 06 - before Virgin Media took them over - I cancelled my broadband contract with ntl. Imagine my chagrin then when on Fri last I got a letter from Virgin Media saying that I had not been paying for my broadband service but that the 'right amount' would be taken from my account in future. The letter from the Customer Service MD, went on to say.... 'as this was our mistake, we won't ask you to pay the difference'.
I contacted Virgin Media customer services and after 20 mins or so managed to persuade the patronising operative that I had never had broadband from his company. He undertook to 'sort it' but, in answer to my question, saw no reason to provide me with written proof that I didn't owe any money.
I have since e-mailed the Customer Service MD with a request that he: furnishes me with a letter (or e-mail) stating unequivocally that I do not owe any money; deletes my details from the database inherited from ntl (they have my address AND bank details); and confirms that I have not had, nor do not have an account with Virgin Media.
Having witnessed at first hand the telephone operative's handling of the situation, I am less than sanguiine that I will receive the assurances I seek. Any ideas what else I can be doing?[ii]
In Dec 06 - before Virgin Media took them over - I cancelled my broadband contract with ntl. Imagine my chagrin then when on Fri last I got a letter from Virgin Media saying that I had not been paying for my broadband service but that the 'right amount' would be taken from my account in future. The letter from the Customer Service MD, went on to say.... 'as this was our mistake, we won't ask you to pay the difference'.
I contacted Virgin Media customer services and after 20 mins or so managed to persuade the patronising operative that I had never had broadband from his company. He undertook to 'sort it' but, in answer to my question, saw no reason to provide me with written proof that I didn't owe any money.
I have since e-mailed the Customer Service MD with a request that he: furnishes me with a letter (or e-mail) stating unequivocally that I do not owe any money; deletes my details from the database inherited from ntl (they have my address AND bank details); and confirms that I have not had, nor do not have an account with Virgin Media.
Having witnessed at first hand the telephone operative's handling of the situation, I am less than sanguiine that I will receive the assurances I seek. Any ideas what else I can be doing?[ii]