Thanks for writing your query
I feel sorry for the suffering you are going through. Usually the plate doesn’t break easily, but that has happened because the bone union was there but lacking consolidation and the fracture
site was fully dependent on plate.
Having said that let's have a fresh look I need to see your x ray
picture .But I usually treat such patients with bone grafting
with preferably interlocking nail.
I shall be glad to answer any further query of yours.
Take care and wish you early recovery.