RCS exploiting customers

I am shocked by the way that RCS is trying to exploit customers.

On the 11th of March 2018 my statement showed that i needed to pay R 104.61 and i owed R 131.09 in total on my Game card. I paid R 132.00 on the 4th of April 2018. On the 12 th of April 2018 i received a sms indicating that my balance is now R 0.82. Now in June i received a letter from RCS telling me that i did not pay my account of R 105.75. How can i suddenly owe R 105.75 if i purchased nothing and they owed me R 0.82 in April?

I never realized that the economy is in such a bad state that RCS has to start exploiting people to ensure a income.