[meford4u]

Oscar, make sure you take care of this today. Milk goes bad very quickly in warm temps. inside that heated car of yours. And this will stink your car up forever!
I've dealt with this before and I had to sell the car I couldn't stand the smell anymore.
The best way to clean carpets is with very hot water and a steam cleaner.
Since this may not be an option for you, call the Tim Horton's this very minute and tell them what happened and that you expect reimbursement.
Then make arrangements to have the car steam cleaned today.