CellC customer services not responding to my request

On the 21st of August 2017 I made a call to CellC call center and asked for a phone record and they told me they are not allowed to do that so i should email the customer service and they told me that I will get the response within 48hours. I did that on the same day but up to today there's no response. I tried to remind them with the reference I was given but nothing at all. It's so sad because this phone record was needed by the bank because of the time of in my phone that was not corresponding with the normal time.