Warranty not enforced

I returned an Aqua aquarium air pump a few months ago, it supposedly had a 3 year warranty and one of the outlets stopped functioning. I spoke to Chante/Chandre the manager and she said she would get the rep in to assess the product, she said she would call. A month later and nothing. I went into the store only to find that the unit was still there and the rep had not had sight of it. Again she said she would call and nothing. It has been 2 months since then and nothing