AIRTIME MISSING

I am very disappointed with MTN on the 30/06/2022 after 5pm I bought a recharge voucher for R30 at PEP. After recharging I bought 1 day WhatsApp Data Bundle for R2 , my balance went up to R28. The next day I tried to make a phone call, it was told I don't have airtime???????? I called customer call only to be told I bought a voice / minutes voucher for R27????????Ever since i started using MTN I have NEVER bought Minutes or Voice Bundles reason being I DONT EVEN KNOW HOW THEY WORK!!!!!!!!What shocked me is if i bought those bundles , they still ****** ME , because still my balance is R0.00 on voice and bundles and airtime???? With the cost of living going up like this , one would have really budgeted that R30 to make it last. MTN i am not happy at all🥵🥵🥵🥵🥵🥵🥵