Debiting more than the agreed amount I want a refund. disgusting service ever.

I HAVE BEEN PHONING 135 THEY GIVE REFERENCE AND LATER CLOSE IT WITHOUT ATTENDING TO IT. I HAVE THREE REFERENCES OF WHICH NO ONE CAN ASSIST. I HAVE BEEN THEIR CLIENT FOR MORE THAN 20 YEARS, PAYING VIA DEBIT ORDER INSTEAD THEY ARE NOW DEBITING MORE THAN THE CONTRACT AMOUNT, ***, ***, I HAVE BEEN COMPLAINING SINCE April THEY TOOK DEBITED R1023 and R886 in July 2020 you can trace with this references.