Yes I agree with msm2000uk.
QR isn't a company where you get far by escalating things. Higher management expects low level point of contacts to deal with such issues. I know damn well that this often doesn't work, but at that point giving up is the only feasible way to proceed since you won't be hitting anything but walls from there on.
The only way to get some leverage higher up the food chain (other than knowing the right people in Doha) are their POCs on social media.