contract

here is my contract number A***, i took the 80GB a month package, my first month you dedicted R1700, now i am getting an invoice that says i must pay R1197, i am expecting to pay R300pm, when i opend the contract i told the lady toshutdown data if exceded the limit, this month i got 54GB instead of 80GB, and i was promised that my contract will be emailed its been 3 months now, no email