I HAVE RECEIVED A RAM 256 MB FROM A SELLER 809ROCK.I RECEIVED IT AFTER 14 DAYS AND IT DIDNT WORK.I RETURNED IT TO HIM IMMEDIATELY.HE SAID IT IS WORKING.THEN I ASKED HIM TO RETURN IT TO ME.HE SEND IT TO ME VIA REGISTERED POST BUT AFTER FEW DAYS HE SAID IT WAS REVERTED BACK TO POST OFFICE.HE SAID I WILL AGAIN SEND YOU BUT I HAVE NOT RECEIVED YET.HE MADE A CONTINOUOS CONTACT WITH ME VIA MOBILE AND EMAIL AND MESSENGER.BUT THEN HE HAS NOT CONTACT ME STILL.PLEASE HELP.....................