Vodacom refuse cancelations of contracts for pentioner

Vodacom renew contracts year after year . Cant cancel they add services with out information and knowledge there off like RefFlexi Zero . They do not want to provide voice recordings Now I sit with new term renewals and it cost more and more every time . My mother is a pensioner and they just cost her more after multiple cancelation and no one can give a straight answer or complete the original cancelation *** *** *** *** ***