I fully understand how you feel about Pipex - am having similar problems too - and as far as talking to their 'customer services' they clearly do not understand what the words "customer" and "services" actually mean.. you never get to talk /email with the same person twice, they always come up with the same spiel and how sorry they are for the inconvenience etc... but at the end of the day, lack common sense.
I have in the past called 0207 087 2000 but this gets transferred to Ireland. Tell them that you do not wish to be put through to India or the Philines at your expense (after all, having to pay 5-10p per minute for a valid complaint is clearly not good enough!) and I don't see why I, as a complaining - and now ex customer, should be billed for expensive 0871 calls... and then!! to be put on an indefinite 'hold' while the minutes add up... Greedy bunch of B...s
Perhaps write to Mary Turner, CEO Pipex UK ltd - 20 Broadwick Street, London W1F 8HT (same tel nbr as above) lets see how good this lady is at being CEO.
I shall be writing to her also, but won't be holding my breath here.. as far as I'm concerned they can take me to Court as I have paid my accounts in full and final settlement. Cheques banked and cleared - yet they are still chasing me for payment - paltry amount of £1.38 and £16.08
But what bothers me is my credit ratiing - if they do get in touch with the credit agencies, this will end up being yet another correspondence course, more hassle and more stress, as if Pipex haven't contributed enough where that's concerned..
see my post about Pipex added 23rd May 09.
Good luck with it all - would be interested to see/hear how it turns out.
But... keep at it and don't give up!