Bad service and broken products

I have contacted your call center regarding SEVERAL toothbrushes that I have purchased since the beginning of December 2015. To be specific it is the three way head buzz toothbrush that stops \buzzing\" after a couple of weeks. They spent the money to come and collect the one damaged toothbrush I still had but can't be bothered to replace the toothbrush. Since then I have had two mor of the same toothbrushes in the hope they will work, but alas, same story, stops buzzing after a couple of weeks. Shame on you Glaxo Smith Kline for not following up and on poor products."