Consistent inaccurate billing and poor customer service

Consistent inaccurate billing which makes it hard to budget accordingly. Often overfilled for services. Poor customer service where emailed queries are not responded to and fluctuation of smrt wallet account balances. Would not recommend to anyone. My billing for the 9th of March 2019 alone was R669.80 and has not been rectified as yet, 3 days later, after I complained.