Cell C Enough is Enough im Done !!!

I cancelled both my contracts with Cell C and opted to stay on prepaid because I was not happy with the service. I got an sms from them in the morning telling me they have migrated me to Supercharge, which is fine BUT they took all the airtime I bought this month over night and left me with nothing. The Customer care people tell me it will be refunded after 2 working days .... Until then WHAT? I buy more? Seriously Cell C after all these years and continues disappointment I am finally bowing out. I am done with you. Keep it all for all I care.