I have just rang T-Mobile regarding the account & it was from 2011 which i was in dispute over an early termination fee which i got Cisas involved & they contacted T-Mobile & all seemed to have been sorted out & 2 years later i get this letter from HL Solicitors saying they want £1027.66 in 14 days. Madness !

Letter in PDF Attached ! Please advise on what i should do Thanks

Hi im new to the CAG forum so may need some guidance... It wont let me add a file of the letter until i have made 10 posts so please message me & i will email the letter to you directly I have not had a T Mobile account for nearly 2 years, at the time i had a dispute which i cannot even remember what it was about because it was so long ago & they have never wrote to me regarding this & i left T-Mobile & moved on & got myself a contract with Tesco Mobile & now i am in another contract with Virgin Mobile so its way back since T-mobile were my provider ! Sigma SPV1 Ltd have Never contacted me so i dont know what their input into this matter was all about & now HL Solicitors have contacted me for the First time asking me to pay an outstanding amount of £1,027.66 in full within 14 days which is the first i have heard about it ! This letter which i received from HL Solicitors was the first contact i have had off anyone concerning my old T-Mobile account ! Are Sigma & HL for real ? ADVICE MUCH APPRECIATED PLEASE !