Seller doesn’t respond for warranty replacement or repair

We purchased this item August 2018. They were fine for a few months then the lining split and the filling is coming out. I contacted the seller a couple of weeks ago about the warranty. He seemed like he was going to be workable, then quit responding. I have sent 3 emails that have not been responded to. I even called again this week and he said he would call me within 24 hours, that was 3 days ago. I even indicated that we needed them ASAP for my sons class at school. Will update when and if we reach a resolution.

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