Am I being ****med by Discovery?

Discovery reimbursed me R47,000 in error instead of R26,000 for orthodontic treatment They didn’t even realize it. I called and alerted Discovery. They were very grateful and asked me if I could transfer/return the entire R47K. I did so the next day. I was promised that I would receive my R26K in the next two/three days.

It’s almost two weeks now, after many calls and complaints... I have still not received my money. I was an idiot, I was an too trusting. I should have kept my R26K and returned the rest. How should I proceed further? Getting no where with promises from Discovery