I had ordered a statement of Comparability from NARIC and they dispatched it on 15th April. I still haven't received it and it's holding up my application.

I had sent it via the standard airmail option. There is another option called "International Signed For" which is registered post. It's also sent via UK Royal Mail (Government mail I presume)
I am thinking of ordering a replacement statement. Does anyone know if this option comes with tracking? If so , does the tracking extend to the Indian end of the delivery chain (where I suspect the delay happens) ? The option costs 8 GPB.
The NARIC website also offers DHL courier but it's insanely expensive at 80 GBP