Terrible quality and no support or client care

Bought a folding French Pane window (crealco) a few years ago. Hardly use the folding mechanism but the lock mechanism failed after about a year. Asked out installer to have it repaired and he got some parts under warranty. Unfortunately the guy passed on and now these guys refuse to repair it under warranty. The quality of the metal used on the mechanism is so fragile that the backing plate today just broke right through because of the spring loaded lock. Terrible product with worse support.