Cell C not re-imburse my data

On the 12th August 2019 my Cellphone number was port out of cellc to mtn. I phoned cellc to inform them that my mobile number was ported out of their network and this happen with out my permission. They acknowledged that this could be *****. I finally managed to contact mtn and asked them to move my phone number back to cellc, that process was successful. I asked cellc to re-instated my 160GB of data that I had on my sim card before the port incident occured. They are giving me the run around with their porting department keep logging internal queries with other departments but no one is getting to the bottom of what happen and re-instate my data on my sim. Cellc contacted me via email and asked I email proof of purchase of data. I did so which I bought 200GB worth R2000 at Irene mall in centurion. So if they receive the proof of payment I sent them then why do I get a feeling they are looking for excuses not to re instate me my data