a british ex-pat has been found hacked to death at her home in south africa .
reports in south africa suggest the 74-year-old 's attackers had mutilated her - although police have yet to confirm this .
mrs malcolm , originally from dundee in scotland , was found on sunday morning at the capri mews complex in the marina da gama area of the city .
the pensioner had been planning to return to visit family in tayside .