MONEY *****S

On 22/08/2018 I made a partial payment of R7500.00 on my loan, after which my settlement amount was R126, valid for 5 days, (the only reason I did not settle the full amount was due to my monthly transfer limit). On 25/08/2018 I was debited an amount of R1469.05, GETBUCKS is now only refunding an amount of R920.57 after numerous calls to their call center and online chats using their online support. How does a settlement amount increase by over R400 in 3 days when their settlements are valid for 5 days?

My refund should be for the amount of R1343.05 INSTEAD I GET BACK R920.57 A DIFFERENCE OF MORE THAN R400.00

The service is terrible and it's a ******* DO NOT USE GET BUCKS.