I also had my VXL AGS delivered three days late. The compensation amounts to some where around Rs. 1K. Had sent multiple emails to Pak Suzuki but without much success. Interestingly, Suzuki paid the withholding tax on the compensation amount to FBR in December 2021, but didn't pay the remaining amount to me.
I also used to experience that issue of lag in reverse gear, but afterwards realized that it was caused because I didn't press the brake pedal completely while engaging in reverse gear.
As soon as I began doing so, the problem vanished completely.