Capitec blocked my account without hearing my side of the story

I am Rey disappointed in capitec, my account has been blocked and I’m starting a new job on the 6th of February, I’m supposed to produce my three months bank statement at work, I don’t know what to do… capitec blocked my account because of a client who bought something from me in December and wanted a refund during the end of January after she had damaged my shoes when returning. Capitec didn’t bother to want to know the side of my story. It’s a new year, how am I supposed to live. Please kindly assist asap