Verification of FNB Home loan documents

These attorneys failed to verify my documents from FNB that had a discrepancy of an interest rate. The initial documents from FNB at an interest rate of 11.40% which I based my decision on to accept the home loan & even signed off, was no longer the same as on the documents that they sent with the commissioner reflecting an interest rate of 13.50% for me to sign off in order for the bond to be registered. Upon signing the documents with the commissioner who was in a hurry for another client, I asked if the documents from FNB were the same & I got told yes. When I send them an email to the Tim Du Toit Attorneys they reverted indicating that the onus was on me to verify the documents which doesn't make sense for me since these services they are suppose to render.