Brought airtime and was not recharged

I bought airtime on 26 February 2015 and was not recharged. The bank told me to contact the service provider (Cell C) to have this resolved. Cell C then confirmed via email that the bank did not pay them for the airtime. The bank has since opened and closed an investigation without refunding me my R150 back. The reference number for the investigation done by the bank is ***.Cell C has advised that they cannot call the bank directly to resolve this issue. Standard bank needs to call Cell C's Finance department to get any information related to this problem. I have an email with all these details from a Cell C consultant who has been assisting me with this matter.