DEDUCTING ACCOUNT INCORRECTLY 4 TIMES ALREADY

I'm very unhappy with Capitec this is the 4 time that they are deducting money from my account for a personal loan.First time there came money in to the account and they deducted 2 payments not even on the date that our contract is stating. Then we sold a car and money came in and again they deducted an amount way before the contract date. We then pay money into the personal loan and then Capitec took that amount and split it into payments and for 3 months. This morning there came money in again into our account (20/02) and they deduct the personal load. This is unacceptable as this money must come from my salary not from money that is paid into my account. I want a answer from Capitec why this is happening and when they will sort out there nonsense. I'm about to take away all my money from them and go to another bank if this is the way that they are dealing. This is a breach of contract as my contract with them is stating that the money must be deducted from my salary so why took it if there is coming money in. I want an answer by the end of today otherwise I will go to the Ombudsman and closed my account immediately.