Account on hold

I am facing challenges with Capitec bank in which I sold a bus to some guy from mpumalanga, the guy transferred R150 000 to my Capitec account, and later called capitec that he transferred the money by mistake and he doesn't know me, my account is now put on hold for a month, regardless of me proving to them that I know the guy and he bought a bus from me. I feel so helpless as my kids are now out of school because of this situation, I just want to get my money and close the account and move to the other bank as I don't feel protected as a Capitec client, they protect people who are not their clients and **********. I'm even thinking of keeping my money at home after this suffering but will I be safe? This situation is so frustrating