BMW India — Car Design fault

Address:

Noida

We are owning one BMW car X4 model bearing registration no UP65DQ6565. The acr was sent for routine services to Deustch Motors Sector 63, Noida, Up on 02.04.21. We observed that Wiper Shower not working ans same was reported to service feed back person. They promised to resolved the matter in next few days to by sending their service technician at our address. But then we were told that because of lock down it could not be arranged. My car was sent again for brake repairs yesterday and same matter was raised again to them. But strangely we were told that it occurred due to rat biting and so we have to pay for it and the part is also not available and it will take 15-20 days to arrange it.
We wish to be informed on this matter from the company is the design of car so bad that rat can reach anywhere in car, If its so then you are required to improve in basic design as you are making one of the finest car in world with finest technology.
if we are offered comprehensive warranty of the product for three years how come we be charged for parts which are damaged for whatsoever reasons.
Please look in to the matter seriously and respond back.
Sunil Agarwal
+91 [protected]