FNB is a great bank, but they failed me...

FNB is a great bank but this time they have failed us. My business partners and I have tried to register our business using the CIPC FNB platform. We completed the online registration process (from step 1 - 5) including the payment process. We were then requested to email our FICA documents through to the following email address: ********** . After completing this task in November 2018 we received a direct response from Mail Delivery Subsystem ********** ''stating Recipient inbox full (Your message couldn't be delivered to ********** Their inbox is full or it's receiving too much mail at the moment.)'' We completed the same process at least 4 more times since then. We have called the FNB CIPC customer care department and managed to speak to a consultant who suggested we repeat the same service over again. We did that again and received the same response: Mail Delivery Subsystem ''stating Recipient inbox full (Your message couldn't be delivered to ********** Their inbox is full or it's receiving too much mail at the moment.)''. We currently are in need of assistance in terms of resolving this issue as we are unable to successfully continue our business venture due to this major setback. We did receive a reference number from FNB : Cmqkp2hN4MwW. Please can anyone be of assistance.