Debit more that what they said on the statement

The company is not organized the over debited me and when i enquire the told me of an old case. My last month statement said i am owing 316.12 and they debited 633.19

When now i check my account online see the below, please help.

Your last account payment: R 633.89 paid on 1 Jun 2021

Amount now due: R 313.78 to be paid on 30 Jun 2021