FNB refusing to sign the claim form so I'm unable to claim

I'm trying to claim from the insurance as I've been retrenched and I've been to 3 branches who are refusing to sign and stamp the cessionary details for me to claim. Tomorrow you guys will be harrasing me for non payment when you are refusing me to claim from the insurer. I went to maponya mall branch and they refused to sign the form and give me a stamped bond statement, I then went to randburg square which gave me a bond statement which is stamped but refused to sign the cessionary document, I then went to Southgate branch which signed the cessionary but refused to stamp it. So I'm now stuck between FNB not iua which wants those documents for the claim to be done. At this point in time I hate FNB because they giving us endless problems. It was 1st my husband who experienced bad service with the home loan and now it's me. We gonna change banks shame. I don't even know what to do with an incomplete form