Leg-spinner Adil Rashid took the key scalps of Quinton de Kock and Temba Bavuma as England beat South-Africa by two wickets in the third and final one-day-international. World-champions England won the toss and elected to field, restricting their hosts to 256 for seven in 50 overs, a below-par score on a day when the players wore pink to raise money for breast cancer awareness.