Try a local law centre first(posted 8461 days ago)citi bank m/s claims were assigned to PSPC - you will prob find the assignment does not allow them to bring an action after 6 years - defective deed-
there usual solic chivers eastern brown will back down eventually
if you feel you are being harrassed then try s.40 Administration Justice Act 1970 - makes it a crime to harrass any debtor -max £5k fine or prison??
good luck