Disappointing experience with MTN from worse to worst

I just recently ported from Vodacom to MTN but that experience has been very bad. From dealing with *********** consultants to mistake after mistake. I must say it's very unprofessional. Now, I just loaded R100 airtime and bought data for R17. I'm suppose to have R84 but sitting with R41 and I never made a single phone call or used sms. MTN keeps changing my airtime automatically and I'm lost why have I lost so much airtime? This is madness very upset. My Number is ********** 085.