MRF Tyres — Tyre air leakage

Dear Sir,
I own a Harley Davidson Street 750 and I had recently purchased new MRF Tires for my ride. Please find the attached bills for your perusal.

I am writing this email is to let you know that the air pressure in the tires (MRF ZAPPER) are constantly deteriorating and I am worried that this might lead to a blow out . I am forced to refill air in the tires every week and this can get tricky as I am unable to handle the vehicle smoothly due to air leakage. I had purchased this new set of tires this January. My vehicles registration number is KL43H202. I would like to urge you to do the needful at the earliest to resolve my concern.
My contact details:
Anoop S Nair
[protected], [protected]