Pad heating device failed

The pad works as intended. But, after 2 months of daily use the control mechanism started to emit a high pitched "cricket" buzzing sound. I contacted the vendor who promised to send me a return label, and that they volunteered to replace it, and now 2 weeks later, they have not followed through with their promise. I could not return it via Amazon policies as the return date was long passed. Terribly disappointed.

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