Now, you know, I’m going to hazard a guess here that possibly VM never actually properly cancelled the account, or if they did, it was sufficiently delayed that another monthly bill was generated. I further suspect that VM’s legendary broken and dysfunctional system has indeed decided to farm this supposed debt out to a collection agency and they are probably genuine. Now the fact that VM were seemingly negligent in not informing you of extra charges, plus the obviously bad advice that the sorry excuse for customer services provided, oh and not to mention ‘they aren’t able to send you details of any monies apparently owed’? Not a good look is it?
Now this is probably one for the forum team to investigate and offer to contact you to take details, sort it all out and make a fair offer of restitution for the stress and inconvenience you have suffered, oh £100, I don’t think is out of the question. What I would say for the benefit of any member of said forum team who wants to take this on, there is a very, very good chance, assuming that the OP’s statement is correct, that VM are in breach of OFCOM regulations regarding cancellation, possibly more seriously, in breach of regulations regarding transfer of personal data, the ICO might like a word, and finally, and probably even more seriously, as this regards payments, you never know, the FCA might want to wade in? Stranger things have happened!
Because the alternative is that this goes, you-know-where, and it really, really won’t end well, will it?