Cellc refuse to re-imburse my lost data

I have written a review to hello peter before and cellc simple have not taken my complaint serious. So I'm seeking advice to ask which legal route can I take against cellc. I would really like to hear your advice on the matter. I was thinking of starting with writing to the ombudsman, thereafter I can proceed further

I had lost my data due to my mobile number been ported from cellc to mtn without my permission. My number was port back to cellc but cellc refuse to re-imburse my data. No query that cellc claim was open internally was able to give us any information that make sense. How do they not know from which mobile device was the port requested. This network courier is problematic and it is clear they will not re-imburse, so I am wasting my time with these people. your respond and advice will be very appreciated