FNB gives me financial anxiety

I slept with a positive balance of R2530 and woke up to a negative balance -R2570. The audacity to even send me a message saying my account is overdrafted. When I check my transaction history, 5 transactions have been doubled : R4299, R1000, R233, R237 and R203. I enquired via the online chat and Jason told me there is a technical problem that will be fixed. 4 hours later, im still waiting for my account to be credited with the amount that was debited.