I have moved your post to an existing thread which covers much of your query.
What make and model of vehicle are you referring to?
Most of the New Car Roadside Servicing benefits only apply if you get the Company Approved Service Centres to carry out the services so mostly Dealerships.
Many servicing businesses or Car Insurers also attach Roadside Servicing to their benefits if you have your car serviced or insured with them. This may be a suitable alternative than having to deal with what often times is more expensive dealership servicing costs.
CHOICE produced an article on this very matter that may answer many/most/all your questions:
There are also a number of topics and posts on this site that deal with this question and I have listed some below for you to look at:
