I don't know much, but I see how entire patches of sod are dead.
In my opinion, the guy who sold them should replace the dead patches, especially since they died in fewer than three days.
>> I am an old lady..not very computer savvy..
Perhaps ask a friend who plays with computers more to search for some reviews of the person or company who installed your sod. Then call the person and make a specific request like "replace all the dead squares by this date". Mention in passing a few of the sites where your friend found good or bad reviews, so he KNOWS that he will get more negative reviews if he doesn't make good on what he was paid for.
I think a lot of businesses, large and small, take advantage of anyone they CAN take advantage of. Resisting that kind of small-scale-theft and abuse is a community service, not being "pushy" or demanding.
In many states there is a consumer protection agency run by the state Attorney General. Lodging a complaint is easy. If your friend looks up the exact name of that agency in your state (and a phone number and address or email address), and the seller doesn't want to replace the dead sod he installed, make sure he knows that you think that violates a contract or agreement or decent business practice, and that you WILL lodge a complaint with the agency that you know the exact name of.
If it takes a formal complaint to get someone to do fair work for fair pay, that's on them, not on you.
