3 Payments not allocated despite proof of payment being sent

I have vehicle & asset finance with Absa. They advised me my account is outstanding with 3 months which is October 2021 , January 2022 and April 2022. I sent the proof of payments through to Absa, Salim Van Vooren and Desray Makwetja in order to do an allocation. They advised me that they will allocate the payments and bring the account up to date. I get SMS's every week still showing my account is behind, I have escalated this numerous times to Absa, Salim Van Vooren and Desray Makwetja but don't receive feedback. I am disappointed in the service I have received because the money is paid on a monthly and proof of payment is being sent once payment is done and this also affects my credit score with the bureaus as I will be seen as a slow payer whereas my account is up to date.