Double rates for a call!!

I’ve been a loyal customer to cell C for the past 10 years but today am utterly disappointed. I received an sms from cell_c with just *** and it looked ***** so I contacted the customer care immediately and they assured me not to worry..2 hours later I make a phone call to a friend who is a cell c number with a bonus airtime that I received when I recharged during the day with 150,the call was only 33 minutes and they ****** charged me R133 for that call When I contact the call canter even the agent doesn’t know why cell C charged the call on my airtime instead of bonus airtime And am told to wait 48!! They still investigating Well I don’t have 48 hours I want my airtime back and am out of this ****** network service with its *********** call center agents that shouts at me