Sick to my stomach with thi service! You best fix it immediately or they will be severe consequences

I am EXTREMELY disappointed and disgusted at the service I am being given! I have sent a ticket to be called back over 10 times now. Wrong debut orders! MORE THAN ONE A MONTH!? and for the first month I had the R250 plan with a SET LIMIT ON R0 when it capped time! And still charged for that, then upgraded to the R480 plan. R288 was deducted and then another R45 all in one month??? Then gets cut off and says a payment of R89 must be made to have my internet put back on, meanwhile decusted R480 (30th July!) And now the 2nd of August it asked for ANOTHER payment of R480?? 3 days later???? this will be my third month and now I am asked for a 5th payment??? I want my money back or my wifi out on back on! Now I have saved enough money for just my wifi being jobless and trying to start an online business and without wifi what must I do?? Because now I have to beg and borrow more money when I ACTUALLY HAD ENOUGH TO PAY! Sort this out immediately or I will take this further.