How do I call for a job in a store?

Is it better to call and ask if they have any vacancies available. I have a few numbers for a different stores but I think they are just customer service numbers. I couldn't find any hiring managers numbers. Can I ring these and ask to speak to a hiring manager? I'm just looking for a satire assistant job... show more Is it better to call and ask if they have any vacancies available. I have a few numbers for a different stores but I think they are just customer service numbers. I couldn't find any hiring managers numbers. Can I ring these and ask to speak to a hiring manager? I'm just looking for a satire assistant job in Dunnes, lidls and other supermarkets
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