Incredible connection credit *****

So I had a account with incredible connection where a set debit order was taken on a monthly basis. The debit order was for R1452 monthly my last Installment on the account was this month and the balance owed was less than R500. I then had a mysterious debit order for R852 with a reference hi finance going of my account on the 23rd no problem I though but then on the 27th I receive another debit order for R799 with the reference incredibleconnection. This morning I received a call from a call center with incredible connection about the R852 debit order that. I reversed and logged with my bank as suspicious. The consultant indicated that this is because my. Normal debit order amount was less than my. Installment amount what I found odd is that she then asked me for the proof of payment my concern is that they tried to rip me of on this installment BY debiting me. Twice as well as. Debiting me for not only more than I owed them but also more than agreed on People watch your statements all the time