This one aslo - I think free directory enquiries is useful - even if you do have to listen to an advert!!
Cut and pasted this following section to explain:
Freedirectoryenquries, 0800 100 100
Pros: A real person answers, no registration needed. Cons: Accuracy issues, only one enquiry allowed.
If it knows the number, this is a quick service, with the ad only lasting 20 seconds. Better still the advert is only played after it's confirmed it knows the number; so if not you can ring off. It's also an easy number to remember.
The business model behind this is interesting. To make it viable, the advert you're played will tend to relate to what number you're asking for and also allows you to connect through, for free, to the advertiser. e.g., if you ask for the National Rail Enquiries number, the advert is for Eurostar.
Be positive & look after yourself, there are more important things in life than debts....
Best Wishes
Emma x