Unsatisfactory customer service

I upgraded my mtn contract and they gave me a new device with a new sim which included once off 30Gig data to expired in 30 days, to my suprise it expired after a week or so, i logged a called and they said consultant will get back to me, even now the query is not resolved after 48hrs, Ref number *** my alternative number is ***. ID number ***7 ****3, email ***