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顧客はフロンティアインターネットは失敗していると言う
Frontier customers express concerns over poor internet and phone services
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Frontier Airlines eliminates customer service phone line: Here's why
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Customers frustrated by continued Frontier service problems
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Frontier Airlines shuts down customer service phone lines
フロンティアコミュニケーションズの顧客サービスに関する問題の増加
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Customer Service...The Final Frontier
Customers still without service after Frontier problems
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Disconnected: Frontier Communications Customers in Northern Tier Tired of Poor Service
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Frontier billing error results in termination of elderly couple’s phone service
