There's no mention about components in spellcasting service. I only found this:
A character possessing the acolyte background requesting spellcasting services at a temple of his or her faith may request one spell per day from the Spellcasting Services table for free.
The only cost paid for the spell is the base price for the consumed material component, if any.
Does the character need to provide components when using spellcasting service? If not, then is providing component entitles the character to a discount to the service?