If you do, it's not straightforward registering your complaint. It can necessitate your contacting by telephone a 'Call Centre' in India or trailing through BT's website to find the following:-
http://bt.custhelp.co...mail/c/2702,2705,2721
However, when you have completed the 'on-line' document, and press 'submit' you may receive a message saying "Date in wrong format re-enter using DD/MM/YY." Then after numerous attempts to get the date correct you end up (as I did after numerous permutations) realising that a date such as 20/10/2010 is being rejected but 20/10/10 is acceptable.
Incidentally, my complaint to BT reads as follows:-
" I have reported to your 'Call Centre' in India that my broadband speed has dropped from 6.3(Download) 0.22 (Upload) and is now tracking at 1.7 and 0.16.
It was my understanding from India that, within a period of 24hrs, a Technician within the UK would contact me by telephone to discuss my complaint.
I am still awaiting a telephone call or some form of action on this matter and request a response from you on the issue concerned."
It will be interesting to see what happens.!!!
Ron