Short Notice Period - Sundays Being Counted

Hi,
I have recently switched jobs. My previous company had a 3 month notice period of which my current company bought 1 month.
Of the 2 months notice period remaining, I served about 1 month and 5 days after which I adjusted the total PL available with me - which exactly matched the number of balance working days available in my notice period.
While settlement, the company has indicated recovery from me of 7 days- citing the Sundays/Holidays in the notice period too and not just working days!!!
Is it even allowed?? Can they include Sundays/ Holidays in notice period calculation to deduct money??

Sundays, holidays or week offs will be provided if an employee worked for 6 days a week and the 7th day (Sunday) will be considered as weekly off. So the weekly off's are also paid days for working for 6 continuous days or 48 hours. so when you dont work, you will not be eligible for any holidays or weekly off's.