Unhappy with service or lack of

Very dissapointed after spending R900 on a start up and airtime of R100 and data R150 and, a screen protector. Been asking for an invoice of why I was Charged R900 and no response. 3 days I have been waiting for an invoice. Will rather stick with vodacom as Shireen at MTN LA Lucia cannot tell me why I'm Spending so much for a start up and screen protector and data and airtime of R250. All I'm wanting is an invoice.