Mtn non existent voice bundle menu

Does mtn have a proper menu to buy all net bundle for a month , I only find mtn -mtn daily or weekly bundles what about us we we to call all networks and we spend long time on the phone . Just like we buy data bundles there must make monthly voice bundles available this is ridiculous , maybe we should consider porting to Telekom, this is not on and the call center agents are ridiculous they keep repeating *136*2# or *141*2# we need change