I phoned Debt Line (RG Debt Management) and they told me that they instruct a company called Tabtext to send out the text messages.
I have been unable to determine anything about this company.
 Sep 29th, 2010
Keep getting mobile text messages from Debt Line 01202 266360 in Bournemouth.

Message says .....
Hi Robert, No luck applying for a loan. I could have the right answer for you to clear your debt.
Call me on 01202 266360.
To Opt Out Text NOT to 87222.

I will not text them to opt out because they have no right contacting me. I will phone them direct and give them a piece of my mind.
If they keep texting me I shall report them.
There have been reports of other phone calls from this Bournemouth dialling code 01202 .....
01202 629255 Also Debt Line ...
Company Name: RG Debt Management Services Ltd, Walton House 56-58 Richmond Hill, Bournemouth, BH2 6EX

See also http://whocallsme.com/Phone-Number.aspx/012-026-29255
 Sep 29th, 2010