England failed to defend 342 as Miller 58* leads South Africa clinch a 2-0 series victory.
India produced a dominant performance against England to triumph in the first-ever ICC U19 Women T20 World Cup.
England slump to 27-run defeat despite Jason Roy century.
England will travel to Bangladesh in March for a rearranged series of three one-day internationals and three Twenty20 internationals.
The pacer has been recalled to the England squad for the two-Test series in New Zealand in February.
England have named a strong 14-member squad for the three-match ODI series in South Africa that begins in January.