Fnb Short Term insurance service dissapointment

I am insured with Fnb for my short term insurance and I have 0 access on windscreen repair. I had to put in a claim for my windscreen repair after a crack, and now they want to force me to put in a generic windscreen which BMW has advised not to because of the electronics on the glass and also how it will affect my Motorplan /warranty which I even sent the letter from BMW to Fnb.

I have been waiting for my windscreen to be fixed now for more than a week and also they want me to pay for the excess of Which was not on my contract, because the original glass is more expensive.

It’s okay when I am paying the monthly fee, but when it comes to claiming, I have to go up and down and calling non stop for my issue to be resolved, which is still not resolved.