Worse experience with Finchoice

I regret taking a loan with Finchoice. My employment contract expired last year February and I still made plans to pay back the loan. Then on the 29th April I “settled” my account. I say “settled” because the remaining balance was like R120 and few cents. Then to my surprise few days later my Finchoice account says I owe R900+ because they refunded my account with R600+ ( which was debited the minute it hit my bank account) now I have to fix Finchoice’s fault and settle the account with the money I don’t have. I am unemployed with no income at all how am I supposed to pay that money after working so hard to settle it? Who asked for a refund? For what ?whoever processed this need to be accounted for their mistake. Shame Finchoice really did me dirty big time. And I will never ever go back to them should I need a loan. Never