10 year Capitec Bank customer waits long for refund

My loan with Capitec Bank is currently in arrears due to my husband being unemployed for most of 2020 for COVID-19 reasons and now I am on maternity leave. I made an arrangement with Capitec Bank to pay R500 towards my loan because it was all I could afford. Friday 29 January 2021 I received my first UIF claim into my Capitec account and Capitec did a double debit to the amount of R5918,34. I have been calling everyone since Friday to get the monies reversed back into my account. Having a double debit is already a nightmare for a mother on maternity. Capitec initially wanted to only reverse R2600 but I insisted on atleast R3000, they refused. I feel that they should honor the arrangement I initially made and refund the whole amount less the R500. Till this day I haven’t received any monies back.