FNB not responding to Complaints with a proper resolution

Two weeks ago I logged a review on this forum regarding a query and a complaint that I had logged with FNB. The response was that an agent would be in touch with me within 2 days. FNB responded that they had logged an "high priority" ticket with their housing department. 2 days later I received a mail saying that the issue was resolved, again with no details of the resolution and no evidence of resolution. I sent a response back and have heard nothing since. I have also received confirmation that it is NOT resolved. Complaint Reference *** assigned to FNB Home Finance. Where do I go next, the Ombudsman?