who is taking the money

I have recently ported my number to cell c. As I did with my previous network provider, I only buy airtime via my Internet banking. One the first attempt the airtime bought never credited. They blamed nedbank and told me to contact my bank to rectify it. Desperate to make use of my phone I had my husband transfer airtime from my absa account. Still nothing!!! It happens ever time I buy airtime online. I was told to email them an example of payment from my bank. 3 weeks later no response. Today I have made 2 payments from 2 different accounts and neither has been credited. Stuck with no ability to use my phone and close to R300 unallocated airtime now I am FURIOUS. HOWEVER having recently ported my number I am locked into this network for 3 months!!!!! I have had my number for years and will loose it if I move now!!! Who is sitting with my money???