ABC Solicitors of Torrevieja Are they Legitimate

Hi I have been approached by ABC Solicitors to act on my behalf to recover a bank guarantee owed on a property I purchased on the Almanzora Country Club development.
There registered address is AVDA De La Purisima, 55 CP 03182, Torrevieja, Alicante.
They are asking for money up front to act on my behalf
Would appreciate a reply from anyone who can verify there legitimacy and any one who has used there services previously

Note i have had one BG returned by Aldea Advisors before they went bust. Apparently ABC solicitors are taking over there accounts Is this true?

Much Appreciated
Regards Ron
P.S.This is my first Blog so i hope i have done it correctly