Refund

I paid R2200 on my November installment, paid full installment in December 2018 and went to branch for statement which indicated that I’m not in arrears on my home loan account, on the 10th of January standard bank deducted R4500 on my account and I’m getting paid on the 25th, when I asked for a refund I was told that November I did not pay full amount even thou I have always paid a higher installment and statement proved that I’m not in arrears, I then decided to ask for R2200 cos I have overpaid the account with it and I was declined without any grounds as I’m still going to pay January installment on the 25/01/2019 I’m inconvenienced since I neee to use this money today