[danielf]

I had the same thing. I cancelled in September, and they kept billing me till January, even though I called them every month to complain. For some reason the system kept generating bills, and my account got reinstated after having been disconnected. I haven't received a bill for February yes, so touch wood.

Give them a ring, but if my experience is anything to go by, this may not be resolved with one call (I had to call them 7 or 8 times alltogether).

To be honest, it is usually not a good idea to ignore bills (even erroneous ones). Unless you complain a company (any company) is unlikely to notice sonething is wong.