Airtime to data issues

Bought airtime of R60 Got sms I received it but never saw it Waited 2 days bought R100 airtime Bought R49 1gb data Balance of money gone Got free skawarra R55 till 12Hoo Went in to mtn tygervalley Explanation was it is used for data Really! Before using my 1gb bundle They stole my money I'm not impresses Be very carefull with mtn