broadband provider problem

[kram_23]

when my 18 month contract with orange broadband ran out i rang them and cancelled it to move to a different provider and i cancelled the direct debit, orange were fine with this and they were very helpful at the time . about 2 months later(FEBUARY) i received a letter from them saying i had stopped paying for my broadband so they were cancelling it and i owed them £36 i rang them straight away and explained i personally cancelled the broadband 2 months ago but they were adamant i owed them this extra 2 months rental, today i received a letter from a debt recovery company telling me to pay or else! surely i dont have to pay this if i feel its their mistake and setting the debt recovery people on me after 1 letter from them and 1 phone call is a bit hasty isnt it? does anyone know where i stand with this or what i should do
many thanks mark

[factor-fiction]

How much notice were you required to give? Or was it clear that once the 18 months was up you could leave straight away Were your payments definitely up to date- maybe you were paying in arrears?
Have you asked them how they arrived at the charge?
Good luck- it's very frustrating and expensive sorting these things out with call centres