"Was service" can be replaced with several synonyms depending on the context of the sentence. If the sentence is related to maintenance or repairs, "was service" can be replaced with "was repaired," "was fixed" or "was maintained." In case the sentence relates to customer service, the term can be replaced with "was attended to," "was looked after," or "was provided for." If the text is related to military or law enforcement, possible synonyms for "was service" could be "was deployed," "was assigned," or "was on duty." Depending on the context, many more synonyms can be used, always ensuring that the meaning of the sentence remains the same.