Listo,
I was understanding that if you bought tyres from of the internet, that's all you got.
Just the tyres, delivered by Courier, to your door.
It was up to you where you had the tyres fitted.
Meaning you would get charged for the fitting and balancing, instead of having it done as part of the purchase.
Only exception I can see would be if your local dealer was the one you purchased from.
And even then it would have to rate a mention in the Sale conditions.