@abid110
So sad to see your broken Windscreen , have you contacted Carachi motors ?
Seems they will not entertain complaint and put excuse on tint paper.
Yes tint paper is in black color which has high tendency to absorb heat like other dark colors and thus this could be the reason to over heat the glass. Similarly, inside pressure seems too high, might be before parking, you drove with A/c and all windows closed obviously and then parked with all windows full closed.
Next time, don't paste black tint on rear side, instead use rollable visor type available at Mandviwalla motors from inside.
There are equipment coming to tackle this issue. You can install it too but old school method is most easy option, open a lil bit of your window for easy passage of Air