Poor Service and Incorrect Billing Charges

You have charged me a full amount of R339.00 plus R149.00 at the end of May 2019 for Pro-Rata Data and airtime. According to ICASA you should have charged me R149 plus Pro-Rata as from the 27/05/2019, when the line was activated. This means that the R339.00 you have collected should cover R149 for Sim and Connection Fee and R65 for the Pro-Rata Data and Airtime. You can now bill me as from the end of June 2019, R339.00. This is very poor service and also I have not even receive the terms and conditions, for that I would like to be compensated for 1 month not being charged. Also which means I have over paid by R125.00 for the month of May 2019. I have taken this up with ICASA and they are investigating it.