All bank accounts have an EAP limit, which is used to limit the value of payments made over a predetermined duration, for security purposes. See below how you can increase this limit for Nedbank specifically.
As per the Nedbank support guide:
To increase your payment or transfer limits, you may call the Nedbank Contact Centre on 0860 555 111. A consultant will assist to increase or decrease the limits up to a MAX value of R 150 000.
For security reasons, you are allocated a daily maximum limit for transfers and payments. This limit can be arranged with the Nedbank Contact Centre or the branch for a value up to R 150 000.